Disclaimer: The following is the work of a fanfiction. One Punch Man and Monster Musume are owned by their respective creators and are used for the sake of imagination through storytelling. I do not own either one.

Enjoy.

"Uuuuugh…"

Saitama's breath was rigid, his eyes slowly opening from the peeking sunlight that washed over his face.

His early morning was far from a pleasant one.

Sweat covered his exposed chest, the shirt of his pajamas unbuttoned all the way down and showing the contours of developing abdominals and pectorals. Arms lied out from side to side as his face was in a contortion of pain and exhaustion. Despite having a body of a well defined individual, he wasn't in any sort prideful of the current state he was in.

As best he could, Saitama struggled to prop himself, essentially leaning his back against the head railing of his bed. Every bit of him screamed out in agony, not letting the poor hero lay himself to rest to recover his aching body. Using his sleeve, he wiped away the sweat building on his forehead as his tired eyes looked at the time on his alarm clock.

7:52 AM

Moving himself, he managed to sit at the edge on the side of the bed, his pants still being rough and tired. Saitama cursed to himself of all the discomfort that was surging inside of every part of his body. Also, the fact that he never used the air conditioning in his room to cool off, evidence that the thermostat had a sticky note with rough writing said, 'Save money. Get strong'.

The summer heat was an unforgiving one at that, not helping to give the hero a cooking breeze to ease his soreness. Still, at least he was saving himself the extra currency for doing this. It was a small price to pay if he wanted to build up his mental strength.

Saitama got off from his bed, his shaking steps walking towards the door and opening it to make his way down the hallway.

Perhaps freshening up could deprive the man of the seething fire in his nerves.

Arriving in the fluorescent yet still average bathroom compared to the spacious one downstairs, Saitama turned on the lights before turning on the sink. Rushing cold water filled his palms before he splashed his face with it, feeling any pain washing away little by little. He did this a couple of times until ceasing, turning the sink off finally.

With a calm intake air, he breathed it out, his eyes looking at the hero in his reflection. He examined the details of his drenched face, his wet bangs of hair clinging against his forehead. He wanted to see any discrepancies on him, two fingers pulling down underneath his eye for pronounced lines.

I'm slowly improving little by little from the training I made, the hero thought to himself as he reached for his toothbrush, finishing off the examination of his face, and each time the pain is getting stronger.

The hero gave the bristles of his toothbrush a generous dab of toothpaste before he began brushing his teeth. Usually training to be the strongest takes the longest time in manga and anime. Kenshiro training in Hokuto Shinken, Deku preparing for the exams and Yusuke perfecting his Spirit Gun.

Drinking in the water and building it inside of his mouth, Saitama gargled and swished, cleaning out the insides of his mouth before spitting out into the sink. "Why is it Goku and Alucard have it easy by already being so powerful?"

His criticisms and thoughts out loud halted when he spotted something irregular once he looked back into the mirror.

His eyes squinted as he brushed the side of his hair, an unnoticeable yet obvious to him when he located the change on his head.

At the side of his head, he saw a tiny spot of hair missing.

His eye twitched at the tiny deformity on his head, taking away his hand off his hair. Could it be the stress from the daily activities of taking care of Miia? No, it couldn't be since he was already used to the clinginess of the loving snake.

Placing his toothbrush in the nearby cup on the sink, he left the bathroom, returning to his room to change out of his nightwear.

Well it's only a small amount of hair gone. No use crying over it.

Building up confidence, he searched through his closet for his blue tracksuit.

…

"Okay, I need to change locks or something because this is ridiculous."

The hero was annoyed when he saw the presence of Miss Smith already sitting back on his couch and drinking her usual coffee comfortably once he arrived in the living room.

"Ah, Saitama! A good morning to you." The coordinator greeted as she sipped her coffee.

"Seriously, Smith… as much as I do find you as a friend, you can't come barging into people's homes. Someone will think you're some sort of freaky stalker or bum." Saitama felt irritable since he didn't have a good night's sleep due to his frequent bodily pains but was not cruel enough to throw her out of the house. He sat back on the recliner, reaching over for the remote on the table before turning on the TV. "Although, I think the latter might suit you very well."

Smith only laughed at his complaints as she looked to the hero. "Oh come now. I think that throughout the upcoming year we've known eachother, I only think you would enjoy my company."

"Having one girl in the house is enough." Saitama waved off her defense as he flipped through the channels, stopping onto the news to watch.

Smith smirked as she finished her coffee, placing the empty mug on the table. "Well sorry to say, Mr. Hero. But it would seem that you'll have another lovely gal to bless this spacious household of yours."

"Whatever…" Replaying what she just said, Saitama whipped his head to the woman, a look of shock reigned on his face. "What!?"

Smith nodded, resting her hand on her chin as she spoke. "Another exchange student will be coming today to live with you and Miia. Although, there has to be some paperwork that needs to be done on her part."

Saitama slapped both hands on his face, his fingers nearly clawing as he brought them down dramatically. "Just one roomie is enough for me, please…"

Smith chuckled, amused by his expression but not terrible enough to mock his dismay as she reached over patting his shoulder. "I'm sure you'll do fine, Mr. Hero."

"So what else do you have to tell me? That you're living here as well?" Saitama sarcastically remarked as he gently patted her hand away from his shoulder.

"Mmm… Ah! There was one thing I forgot to tell you yesterday." Saitama turned his head to Smith, a questioning look as he raised an eyebrow to what she'll reveal to him.

The happy expression on the coordinator's face turned into a serious one, one leg crossing the other. "You remember that panty masked thief that you beat up?"

Saitama only nodded.

"Well, apparently I've had to have my strongest member of my team to restrain him since the handcuffs on him immediately broke off once he awakened."

The hero was now curious of what she was unveiling to him; the freak did look different when he was angered by sheer negativity towards him before they fought. One moment he just looked like some sort of freaky exhibitionist and the next, he found the man morphing into a muscled up creature decked out with claws.

"When he was restrained, I took off the panties over his face to capture what he look like and then suddenly, he was just a regular guy right after." A thoughtful look was on Smith's face, finger and thumb on her chin as she remembered the event. "It was completely odd that the man was stronger than any liminal at one point but was completely normal after having his mask taken off."

"Does he get some sort of superpower or something?" Saitama asked, curious on how the pervert gained such speed and strength nearly equal to him.

Smith shook her head at his inquiry. "No, but the strangest thing about him was that he kept on muttering his need of collecting women's wares. As a test, I put the panties back on his face but he was still average despite that."

As the coordinator was thinking, Saitama thought back to the battles he faced way before meeting Smith. Most of them were unlike any of the liminal he come to used to, mainly they were humanoid but were infused with parts of different animals or objects. One such memory was the time he saw a weird guy completely transform into a fish faced monster with S&M getup and armed with a whip. He sadly sighed at the memory, thinking back to how the tailor he visited for his hero costume had to close his shop down while simultaneously, had been kicked out of his home for beating up the crooked tenants in his apartment complex.

"Something on your mind, Saitama?"

When Smith asked, Saitama looked to her, breaking away from his past. "Ah… Well… What you said reminded me of my fights. With weirdos being powered up and attacking people."

Smith raise an eyebrow, mentally taking note of his statement in her mind. "Interesting… Well that's all I have to tell you for today. Don't want to drag your rough morning any longer."

Saitama nodded and would hear his stomach slowly grumbling, causing him to get up and walk to the kitchen. "Looks like it's time to make some breakfast." He was craving for some scrambled eggs and toast for the day to come.

"Ah, shall I take this as an invitation for breakfast as well?" The coordinator cheekily said, a grin spreading across her lips.

"No, get out of my house."

"So mean!"

…

Mii happily hummed to herself as she hung her clothes up on the line, the tip of her tail swishing back and forth to the tune of her humming. Saitama was helping her out, letting the cool breeze of the wind drying away the dampness of the articles of clothing she had. The sun shined brightly, letting the rays help out with letting the clothes to dry as well.

"You seem to be in a jolly mood. What's up?" The hero commented as he finished hanging up the last bit of laundry up on the clothesline.

"So clueless with your questions, but that's what makes me love you even more!" The lamia said as she nearly tacked the hero with hug, his feet were quite sturdy with the wooden floor of the deck as he gently patted her back.

Backing away, her hands were on her inflamed cheeks as she remembered yesterday… in her own little perspective. "How you beat up that despicable guy yesterday with just a punch and walking back home without a care in the world. That's just so cool!"

A giant sized imaginary version of Saitama appeared behind Miia, his fist outstretched triumphantly and a handsome smile on his face, teeth shining with pure whiteness. 'No one will hurt my darling Miia. I swear to that!' The fake gently patted Miia's head which she delightfully accepted.

Is that supposed to me…? Saitama simply looked at the display before scratching the back of his head. "Well, I don't think a girl like you should be insulted for trying to learn a new culture."

Breaking out of her daydream, Miia slithered to the sliding glass door, a look of determination added with a playful wink shot towards the hero. "Next time, I want to protect you Darling!"

"Well, with the amount of training I do daily, I can say for certain that I am fairly stro-WHOA!"

As soon as Miia was near the exit, she heard the scream of her homestay before a sudden CLANG silenced him. Now scared of the unexpected happened, she rushed outside of the deck, wondering what had occurred. "Darling!"

Her eyes widened as she saw a crouched feminine figure, feathered wings spread out wide as her golden gaze was on the lamia. Underneath the figure was Saitama, knocked out completely from having his head colliding against the metal railing and the back of his track jacket clung by talons where the figure's feet were.

Without a word, the figure flew off immediately, carrying the unconscious hero underneath her.

Surprised and completely shocked by the short amount of events happening, Miia quickly slithered to the metal railing and screamed.

"DARLING!"

…

It only took a good five minutes for the hero to awaken, his eyes opening as his hand reached over and rubbed the back of his head. Ugh.. my head is splitting.

The cold air manage to keep him fully awake, his vision only seeing blue skies while pillars of small landscapes was what he witnessed. Confused by this, he looked down and was shocked to see that he was high off the ground. Huh, well that's new.

"... EH!?"

Realizing the horrific situation, he felt two things that grabbed his shoulders, causing him to slap against them while his gaze was still down to the ground way below.

"LEMME GO, LEMME GO!" Saitama screamed out his pleas before his wish was granted, the grip on his shoulders releasing and now having him spiraling down fast.

Saitama flailed his limbs out as he fell, seeing that the location he was about to enter was the park down below. Thinking fast, he spotted one of a nearby trees within his vicinity and literally began to swim in the air to land on it. Thankfully, he crashed upon the heavy leaves of the tree, albeit he smashed into a couple of branches before reflexes would kick in to save himself by grabbing onto a sturdy, large branch. He was just a mere seven feet off the ground.

Panting, Saitama felt his heart nearly beating out of his chest and a look of relief on his face from saving himself from being paint on the hard floor. Calming down, he slowly climbed up onto the branch, allowing himself to sit on it while wiping away the fearful sweat on his face with his sleeve. "Phew, that's a close call right there."

"Are you okay?" A cute, childish voice was what he heard as he looked to the source in front of him.

Flapping her wings and letting her feet land softly on a nearby branch in front of the hero was a blue haired girl.

She looked to be a teenager, evident from her small, petite build of a body. The rather peculiar features on her were her feet being that of a bird's, the toes of hers had sharpened talons and her arms having a set of fluffy wings that had its color match up with her hair. The attire she wore consisted with a blue tube top that covered her chest and ripped jean shorts that were unbuttoned. She sported a happy expression on her face as she looked to Saitama.

He was however, far from being friendly as he glared at the girl. "So you're the chick that nearly killed me?"

She eagerly nodded before introducing herself. "Papi! I'm Papi the Harpy! A harpy is what Papi is!" Her tone was joy filled, despite the mere calamity that happened a while ago.

Saitama, now easing from his initial anger, tilted his head curiously. "A harpy? So there's another liminal I've met."

"Mhm! Harpy the Papi!" Realizing her slip up, she tried to correct herself. "No, wait. Parpy the Papi? Parhy?" She placed one wing on her chin, her opposable thumb poking at her cheek. "Parpy, Papi, Pa pi? Papi, Papa, Pahy?"

Saitama only narrowed his eyes as he felt annoyed by the confusion of her own name, he turned the conversation around. "Where's your host family? You know you can't go around without one."

"That's why I brought you here!" The harpy replied which Saitama only grimaced to her answer.

"Seriously? I almost died because of you!"

Not hearing any word he said, Papi was distracted by the near ice cream stand, a hungry look on her adorable face as she then flew down. "Is it food?!"

"Hey, come back here!" Saitama dropped himself off the branch, landing right in front of the young liminal with arms crossed. "Look, you need to-."

Papi suddenly grabbed the hero's arm with a grin as she lead him to the ice cream stand, although…

One step, two steps, three steps…

After walking three steps, she paused suddenly. Papi turned her head around to look at Saitama, then looked down to see her arm wrapped around his. Letting go and slowly reeling away, her happy expression turned into a creeped out one as she stared at the hero with a nervous tone. "Hey, who are you?"

Saitama raised a brow, realizing he hadn't introduced himself to her but was wondering why she was exhibiting nervous behavior. "I'm Saitama…"

"Ah, I'm Papi the Harpy!" Turning head to see the ice cream stand again, her hungry demeanor returned. "Is it food? I want some!"

The harpy grabbed the hero's arm again and lead him to the ice cream stand, yet…

One, two, three…

Realizing who she was holding onto, Papi let go of Saitama's arm again and showed her nervousness. "Who are you?"

Saitama bit down at his lower lip as his eye twitched in annoyance. First I get kidnapped and now I have to deal with a bird brain!?

It took some time for the two to get ice cream but it was shortly done as they sat back on a bench with their icy treats. Papi had gotten herself a vanilla swirl ice cream cone while Saitama got a vanilla popsicle. The little liminal swung her legs back and forth as she held her cone with both of her wings.

"I'm not allowed to leave until I memorized the Interspecies Exchange Ceremony." The harpy said as she looked happily at her delicious dessert.

"Don't you mean the Interspecies Exchange Bill?" Saitama asked as he took a bit off the top of his popsicle.

Papi began to swing and play with her ice cream cone as she continued on. "It's too hard for me to memorize so when the terminator wasn't looking, I ran away!"

"You mean coordinator and that's really bad." Saitama lightly scolded as he licked his treat.

"It's okay! I've ran away a lot of times and didn't get in trouble for it!" Papi then had a thoughtful look as she tilted her head. "But they said that if I did it again, they might incest me."

"Deport!" The annoyed hero angrily corrected her. "You mean you're gonna get deported and there'd be trouble!"

"T-Trouble?" The harpy was afraid and had not noticed her ice cream falling and hitting the ground. "Ah! I haven't had a bite yet!"

Papi knelt down, weeping that her ice cream was now ruined while Saitama stared. Seeing as how he didn't want to witness a young girl crying, he sighed and got up, now offering his vanilla popsicle to the saddened harpy. "Here, you can have some of mine."

Papi's expression lit up as she looked up at hero. "Ah, really? Thanks!"

Papi leaned towards the popsicle, plopping her delicate lips on it as she began sucking away the long frozen delicacy.

"Uh… can't you hold it by yourself?" Saitama asked, feeling weirded out by the way she was eating.

"I can't really hold onto it since I don't have hands." A muffled reply was all he got as she was vigorous on licking and sucking at the popsicle. "Mmph, it's so good!"

Saitama couldn't help, but feel uncomfortable with how she engulfed his popsicle and it certainly didn't help to hear many people around them muttering and staring at the scene.

"What are they doing?"

"Is he some sort of pervert?"

"Honey, don't look!"

Wanting enough of this embarrassing predicament, Saitama immediately pulled the popsicle out of Papi's mouth. Melted bits of the dessert sprawled out and landing directly onto the harpy's skin. "Well, that's enough of that!"

"Ah, I'm all sticky!" Papi's choice of words were not what the hero wanted to hear as he threw away the popsicle in a nearby trashcan before walking towards the faucet only a few feet away.

"Well, there's a faucet over here so let's wash off- WHAT THE HELL ARE YOU DOING!?"

When he faced the harpy again, he was met with the full nude beauty of Papi's body. Her shapely rear facing him as the blue haired liminal looked to him. "I'm gonna take a bath over here!" she said as she casually was standing naked in the water fountain before giggling, "don't you know you need to be naked to bathe?"

You're seriously the one calling me dumb!? The hero noticed the forming group of people horrified and aroused by the naked harpy splashing about without a care in the world.

Saitama rushed to the bathing Papi, taking off his track jacket. "Wear some clothes jeez!"

"You can join me!" Papi's bird foot gripped onto Saitama's head before pushing him down into the water, his arms flailing about as he managed to get himself free and gasped for air.

"There you are!"

Turning to see the source of the familiar voice, both Saitama and Papi saw Miia in front of them. A fiery aura was around her as she looked quite angry and displeased of what she was seeing.

"Ah, Miia. How were you able to fi-."

"You bird brat!" Miia yelled as she approached the two furiously. "First you kidnap my Darling and now this!? I'm so jealous!" A rose tinge was on her cheeks when she said that.

"Seriously, you're angry cuz of that!?" Saitama exclaimed in disbelief as the two liminals glared at eachother in the pool of the fountain.

"I was supposed to be the one to run away and elope with him! You make me so jealous that it can't be legal!" Miia continued on her angry tirade at the naked harpy.

"What was that!? You wanna fight!?" Papi was also getting quite furious as well, the tension between the two was only getting worse.

Saitama, seeing that he had no choice but to be mediator got between the two of them. "Okay, seriously let's all just calm down here."

Suddenly, Miia's tail rang out, coiling around tightly around Papi's waist and coincidentally, Saitama's neck causing him to choke. "You bird brat! I'll make chicken soup out of you!"

"Who you calling chicken boobs!?" Papi retaliated by scratching away at Miia's shirt, exposing her large breasts while leaving cuts on Saitama's face.

Having enough of this, Saitama got between the two. He bruised face that was nearly bleeding caused them to wince and be afraid. "Would you two knock it off!? I've had it up to here and I don't want a bigger crowd! Huh?"

The three then noticed the group of people now having their attention to a large tree. Looking up as well, they were shocked to see a small, young girl with hazel hair clinging onto a large branch fearfully while tears fell from her tightly closed eyes. "Mama…" she whimpered out as she clung onto the branch tightly.

"How'd she get up there?" Miia asked in curiosity and fear, hoping that the child wouldn't slip off and fall.

"Maybe she flew too high and got stuck?" Papi chimed in, unintelligent on how humans worked.

"Both of you are naked!" Saitama reminded them, both realizing this now. Miia covered her exposed chest before the hero placed his jacket around her while Papi changed back into her attire.

"No worries, I'll just peck her out!"

"Stop, you idiot!"

Papi had a headstart, running full speed before jumping upwards. She expected her blue wings to bring her up into the air and towards the helpless girl… only to fall down and skid across the pavement. "My wings are too wet to fly!" she complained as she got up, flapping her dampened feathers.

Both Saitama and Miia had looks of disappointment when they watched the harpy's failed attempt. Miia huffed out, putting on Saitama's jacket and zipping it up to cover her exposed chest. With a look of determination, she began to make her way through the crowd of onlookers, slithering up quite easily due to her large tail. "Seems like it's up to me to save her!"

Saitama picked up Papi off the ground, his arms under her frame as he carried her through the crowd. Unbeknownst to him, the little harpy's face lit up like a fire when she was close to him. The hero only done this due to not wanting to deal with her frequent memory loss through three steps and her wings being dampened. "Good luck, Miia! And be careful as well."

Grinning at his support, Miia continued to climb up the tall tree. Doing this I'm sure Darling will love my heroic nature! As she continued to slither on up the tree trunk, she had unknowingly encountered the various twigs and leaves that masked her vision and stuck on her. "Ugh! Why are there so many leaves!? Ow!" Before she knew it, she had lost sight of the girl, his search became front as she did her best to ignore the many objects that stuck to her.

The child kept clinging tightly to the branch as support, still afraid of the high height she was in. Her ears took hearing of a nearby voice, causing her to slowly look up, ignoring the fear. "Found you…"

"AHHH!" The poor girl screamed upon seeing the face of the dirtied, leave ridden and exhausted face of Miia, her naturally sweet sounding voice turned into a grave, frightening tone. The scare caused her to lose her grip around the branch, now falling off from it.

In a desperate attempt to save her, Miia shot her tail to arms the falling girl, her small hand however, grabbed too late and kept her fall of despair, nearly reaching towards the approaching stony ground.

"Oh, no!" Papi pushed herself off Saitama, leaping upwards with a single flap as best she could, catching the girl as she collided with her frame although now they were off five feet off the ground and resulted with both of them falling.

The onlookers look on with horror, expecting to see the impending injuries that both girls might suffer from until a blur of a figure sped underneath the falling two and effortlessly caught them with his arms at ease. Blinking from the quick save, Papi and the child looked to their savior, being none other than Saitama simply looking down at them and gently placing them down.

Papi, her cheeks catching glimpses of crimson gazed up at the taller hero in training. "You saved us both? But I thought you might get crushed if you did that…"

Saitama shook his head at her thought. "Nah, both of you are pretty light for me to catch. Also, you risk your safety to rescue that kid so…" the man shot her a thumbs up and gave a kind smile, "you certainly have what it takes to be a hero."

Papi couldn't help that her heartbeat was getting faster and nearly pounding out of her chest as she returned with a warm smile.

Saitama, turning his attention to the small girl now, knelt down to her level. "Mind asking me why you were on that tree in the first place, kid?"

"I um…" The girl was still shook up from having to fall from such a big height, until her eyes went wide as she pointed at something up in the air. "My balloon!"

All people looked to where she was pointing, spotting a balloon that had detached himself from the branch she was on and floating up at such a high height.

The girl was about to find herself in tears again, although the sudden pat on her head from Saitama. "Ah, well that's easy enough. Hold that crying kid, I'll be right back."

Papi and the child were confused on what the hero was insinuating as he got himself down to a crouching position. The next thing that all spectators weren't expecting was Saitama jumping off from the floor beneath him, a sudden gust of wind from the force of his leap was what he left as all tried to cover their eyes from the sheer impact of wind.

As the wind settled, people were shocked and amazed by the hero being so high up in the air and grabbed the string of the balloon before descending back to his original spot. Landing without a scratch or falter, Saitama knelt down to the girl again, holding her balloon out to her. "Here ya go."

Reeling herself back into reality, the girl's depressed state lit up to a happy one as she took the balloon. "Thank you, mister!" The young girl ran back to her mother with balloon in hand while the crowd applauded for Papi and Saitama's save.

As people dispersed, leaving only Saitama and Papi, Miia got herself down from the tree, albeit her whole body was covered with twigs and leaves. "I didn't get to save her!" she cried, Saitama walking up and gently patting way the debris on her to calm her down.

The ringing of a bicycle followed by panting caught the attention of the human and liminals. Approaching the three was a young man on a bicycle, wearing what seems to be a police officer uniform. The young man wore goggles over his face as well as a green helmet that covered up his brown hair.

Still panting, the police officer got off his bike, parking it nearby before running to the three. "I heard that a child was stuck on a tree?" he finally said after catching his breath, "I came as soon as possible!"

"Well you were a little late there, dude. This young feathery lady here saved her." Saitama patted Papi's shoulder, the young harpy still had on her blushing smile.

"Ah, I see. Well thank you for your hard work!" The bike cop gave her a salute to which she happily returned. "Hmm… You two are exchange students, yes? Where's your host family?"

"Well, Darling here is my host." Miia told the bike officer, her arms latching around Saitama's.

"Ah, that's right! They said they were gonna incest me!" Papi remembered, although her choice of words were incorrect.

"That's deport! Meaning you'll get kicked out!" Saitama corrected her, now irritated by the birdbrain's memories. Papi was fearful upon realizing this.

"Sir… Are you this girl's host family?"

The question made Saitama, Miia and Papi froze. The hero could cover for Miia surely since he had her ID, yet for Papi…

"Uh… I'm her host! Yep!" Saitama then blurted out of instinct, causing Miia and Papi to stare at the hero with widened eyes.

"You're quite the generous one, I have to say. May I see some proof?" The cop's further investigation made everyone panic now, fear inducing faces were on them as plain as day.

"Haha… Um… well you see…" Saitama desperately tried to find a way to half ass his counter. "Uhhhhh, I left it at home!"

"And I just so happened to have it right here."

Papi's ID card was flashed in front of the bike cop's face, nearly surprising him but didn't faze him enough to look over the ID. Nodding, he saluted to the three and smiled. "That's all I need for today. Have a great day!" He then went towards his bike to leave.

The three looked to their quick savior, seeing the all too familiar Miss Smith in front of them with a smile. "You're indeed the generous one, Mr. Hero." The coordinator teased as she gave him the ID.

"Ah! It's the terminator!" Papi recognized Smith immediately.

"Wait, you're the one that she ran away from?" Saitama inquired as he placed the ID into his pocket.

Smith only nodded. "Indeed and luckily for you, this little harpy is going to be your new homestay."

"Really!?" Both Miia and Papi said in a mixed reaction of shock and joy, the latter quickly latching onto Saitama's arm, cheering.

"Well, I guess that's why she kidnapped me in the first place." Saitama deduced, one finger scratched at his cheek carelessly.

"Indeed." Smith turned her focus onto Papi with a warm smile. "Now, Papi. Since he's your host family, don't run away from him and do as he says, okay?"

Papi vigorously nodded as she held tightly to the hero's arm. "I may not remember a lot of stuff but the one thing I won't forget is that I'll be with my husband all the time!"

Her declaration caused Saitama to blanch suddenly, knowing two girls have revealed their feelings to him. "H-Husband?"

"Come on, hubby! Let's go to your place!" Papi soon pulled at his arm, wishing to see what her new home was like.

"W-Wait, I…" Saitama shot a glance at Miia, wondering how she reacted to this. To his surprise, the lamia only smiled at him.

"It's fine, Darling. Go and show her where she will be staying. I'll catch up!"

Seeing as how she wasn't angry and gave him permission, the hero led the hyperactive liminal to the path of his home.

"Huh… It looks like you're taking this rather well, Miia." Smith said, surprised that the lamia kept a calm demeanor despite having a new girl over at Saitama's place.

Miia crossed her arms, her nose held high as she had a confident attitude. "Sure, someone barging in suddenly is quite annoying, but Papi is just a child. Yep, only a child. Furthermore, she's a child to which an adult like me can handle!" The lamia unabashedly stretched the differences between her and the harpy.

"Um… I hate to break it to you but Papi is the same age as you." Smith revealed, causing the lamia to flinch and lose her confident facade. "Harpies have petite frames but only for the sake of flying. She's a lot older than she looks."

Hearing enough of this, Miia rushed to Saitama's side, nearly tackling him as she caught his other arm within her grasp. She attempted to pull away at the harpy in sheer determination. "Alright, you get your hands off my Darling, you little chicken! You can walk by yourself!"

"But I don't have hands!" Papi whined, attempting to keep her grasp on the hero. This resulted in an extreme tug of war between the two, with Saitama as the rope.

Saitama only groaned from this, a sigh escaping him. "All I wanted to do was train today…"

A few strands of hair receded from his scalp.

Percentage of hair on Saitama's head: 91%

…

Saitama quietly opened the door to Miia's room as he peeked inside.

On the bed was the said lamia, sleeping quite comfortably on her large bed. Her arms wrapped around Papi's sleeping frame as her tail coiled between the harpy's legs. Papi, in her sleep was visibly distressed by this as she felt discomfort on the frequent tightening of Miia's tail. Since the harpy hadn't have her room made yet, she had to share with her fellow liminal until the construction for her bedroom would be complete.

Saitama quietly chuckled as he closed the door silently. Seeing that he had a headstart in the early morning for training, plus being a half off sales day at his local grocery store, he wasted no time on placing his usual track jacket over him. His sock covered feet coming down the stairs as he let out a soft yawn.

"Well… time to get to work."

With that, the hero placed on his white running shoes before leaving the house. Another day of training had begun.

…

A steady build of sweat was on Saitama, having finished his ten kilometer run through the neighborhood. The strain on his body was not as painful as it was before, the hero was thankful that it didn't occur in sharp, long dredges of discomfort. Catching a steady pace with his breath, he walked down the sidewalk, heading off towards the nearby grocery outlet.

On the one section of the stone wall, he saw a warning poster that informed him of the multiple purse snatchings happening around the area. Stopping himself, he looked it over carefully, his hand rubbing his chin. Seems as though he needed to do his acts of being a hero once again when he catches the thief in the act.

Clop, clop, clop…

Saitama's head shifted upon hearing the nearby clopping, similar to that of a horse. A horse in town? Maybe there's carriage rides? It was summer so there were opportunities for people to profit from it.

Hearing that it was just around the corner, Saitama walked over, wondering what was going on.

His realization hit him like a truck as he found two large, soft objects colliding against his face and making him be pushed back from the impact.

The hero's body was flung onto a nearby metal pole, the back of his head hitting against it hard and making his head ring out in slight pain. Nearly dazed and sliding onto the ground, Saitama shook it off as he slowly stood and rubbed the sore spot behind him. "Can't a guy go without a day of getting hurt…?" he grumbled as he looked to see who hit him.

"It appears I met someone… Truly, this must be a fated encounter!" Saitama saw that the proud, feminine voice belonged to a blonde haired woman. She wasn't just any normal woman as it was evident she was a demi-human. Her blonde hair was tied in a ponytail and her ears were long, similar to Miia's only to be covered in brown fur. The woman's lower frame was that of a horse's lower body and legs, complete with a tail. She wore a white, sleeveless button up top that contained her large bust while a sheathed sword was around her waist and a large skirt covering all of her lower half.

"I am Centorea Shianus, a proud member of the highly esteemed centaur race!" her introduction boomed with confidence nobility as a hand was over her chest in a dramatic manner. "You must be the fated man that is bound to be my eternal master!"

Saitama blinked at her introduction, seeing as how he needed to tell her his name and occupation as well. "Um… My name is Saitama. I'm a hero in training."

Centorea gasped at his quote, approaching the man quickly and taking his hands into hers. "A hero, you say! Truly, luck has smiled upon me for me to have a master that protect those in need!"

"I… okay, hold on." Saitama gently pulled his hands away as he reached inside of his pocket for his phone. Quickly dialing in a number, he placed it to his hear, waiting for his call to connect. The centaur woman only waited patiently as he was on the phone.

A soft yawn emitted from it as the callee answered. "Mm… Saitama?"

"Hey, Smith. I just got slammed by this horse chick and now she's saying I'm her 'fated master'. What do I do?" Saitama asked as he looked at the liminal he just met.

"You're calling me on my day off for this? Jeez…" Smith tiredly complained.

"Just tell me what to do, dammit!"

"Mm, you must mean Centorea right? Well, she's given special permission to go out alone." Saitama's eye twitched on how the lazy coordinator knew of this centaur. "Apparently, it's special tradition that centaur go out and look for their master to 'serve'."

Saitama's eyes narrowed upon hearing this, his hand nearly shaking. "W-Wait, you don't mean…"

"Looks like you'll have to be her host family." Smith yawned once again as she spoke. "Listen, I gotta ahead off so please do your best to look after her. Good night…"

"Wait, don't-!"

It was too late as Smith hung up on the poor hero.

Saitama looked at his phone in disbelief at how he had to have another homestay in his care. "Fucking A…"

"Japanese spells surely do work wonders, don't they?" Centorea's question snapped Saitama back into reality as he placed his phone back into his pocket. "If one runs into an intersection and bump into someone, they're your fated one! It's one of the oldest spells, aren't they?"

"Not if you killed them upon crashing." Saitama said dejectedly, seeing as how the centaur was naive about the culture of meeting someone. "Listen, those things only happen in anime or manga so whatever you're thinking, I'm not your 'master'."

Centorea was shocked by the revelation the hero told, placing a hand over her chin. "Then maybe I should've ran with toast…"

"THIS ISN'T SHOUJO, WHERE THE HELL DID YOU GET THAT FROM!?"

Saitama pinched the bridge of his nose before sighing. "Listen, with your culture and what not, I could understand. But here in Japan, this is way more diff-."

He was interrupted by a zooming silver Vespa that went past the two at full speed. Upon reaction, Centorea grabbed Saitama to his chest, allowing the helmet wearing racer to get past. She got glimpse of his hand gripping onto a purse as he sped off. "Yahoo!"

Centorea scowled at the speeding thief. "That cur! Committing such crimes!" The centaur yelled out to him, unbeknownst at the slight poking on her shoulder.

Looking down, her cheeks were full crimson as she held Saitama's head to her mountainous bosom, letting the hero go quickly and holding her chest in embarrassment. "E-Excuse me."

Saitama caught his breath again, realizing the situation at hand as he looked to where the thief went off. "Looks like it's the purse snatcher that everyone's been watching out for."

Regaining her composure, Centorea unsheathed her sword and pointed at the direction he went, one horse leg up as she struck a courageous pose. "As a member of the proud centaur race, I cannot abide to this crime. I vow upon my sword!" The centaur stopped her pose as she sheathed her sword. "However, according to the laws of Interspecies, I am not to lay hands upon him. My reason for wandering about was for a master to fight by my side."

You're already breaking the weapon's law. Saitama inwardly scolded as he approached to Centorea's side, attempting to hoist himself up on her. "Well, we shouldn't waste anymore time and catch that thief."

Immediately, one of Centorea's rear legs brought up and kicked at the hero's chest with her iron soled hooves. Saitama managed to dodge the hit with his reflexes, surprised by her sudden violent nature. "What the hell's the big idea!?"

"I am not a simple horse! If you are not my master then cease such depraved behavior!" Centorea sent out a heated argument to the hero to which he only sighed.

"Well, fine. I guess we have to do this the hard way." Curious upon what Saitama was implying, Centorea watched as the hero got into a position, both hands on the road and one foot in front of the other.

"What're you-?"

In a flash, Saitama went of running to the direction the thief went at amazing speeds, surprising the centaur that was left behind. Blinking, she shook away at her bewilderment as she ran as fast as she could. "W-Wait for me!"

The thief meanwhile was looking over the prize inside of purse he stolen, looking over the many bills inside of the wallet. He grinned with glee at what he had accomplished. "Heheh, looks like hit the jackpot this time."

"Hey, return that purse!"

The thief looked up and saw to his surprise the tracksuited hero running towards him at breakneck velocity, nearly coming close to him. Centorea managed to catch up with Saitama, now able to match his increasing acceleration. "The meek shall serve justice to you, villain! Unhand that purse or I shall have you taste my blade."

Scowling at the two, he only pedaled up and made his Vespa sped up on the road. "Try to beat my model 36, assholes!"

The riding thief attempted to make Saitama and Centorea lose track of him, making turns and twists through every corner he could find. Luck smiled upon him as he found obstacles to stop them, spotting a worker moving a bunch of gallon filled jugs of water. Crashing onto them and going past, the jugs of water were up in the air and were right on top of the running two.

Immediately, Centorea unsheathed her sword and sliced away the falling jugs with expert precision, causing the liquids to fall on top of her and Saitama instead. "Simply an amateur move!"

"Um… your chest." Saitama pointed out as he kept running, having the wind easily blow dry at his tracksuit.

Noticing her white shirt was drenched and made the outline of her bouncing breasts quite pronounced, her face was filled with embarrassment as she covered them with both of her arms.

Using the distraction as his chance, the thief jumped off the road with his Vespa, landing onto the decreasing slope below and laughing all the way. "Try to catch me now, suckers!"

Ceasing her embarrassment, Centorea jumped off as well with Saitama falling in suit. Both landed on top of a truck and leapt from there, the collision of their fall caused the truck to nearly falter then explode dramatically behind them. Landing on the asphalt, Centorea gave chase to the speeding devil.

Catching up with the thief towards the side, Centorea placed her blade under the thief's chin, nearly scaring the man. "You shall not run any further, villain! Cease this ridiculous chase and face your- HNGH!?" Centorea's upper frame twitched as she found Saitama on top of her, his hands grabbing at her mammaries for support to hold.

"H-Hey slow down! I can't hold on!" Saitama begged as he gripped onto her breasts for dear life.

"U-Unhand me!" Centorea complained, feeling pleasures run down her spine as Saitama unintentionally squeezed at her large endowments. "And did you not remember about riding me!?"

It was too late now as her buttons were left loose, causing her breasts to flop and bounce with exposure. Seeing her shirt unfastened, Saitama immediately led his hands down around her waist as the Centorea was in pure disbelief of what transpired, her face frozen with embarrassment and blood rushing into it.

Catching an eyeful of her lovely breasts, the thief's nose exploded with blood causing him to crash onto a stack of buckets filled with colorful paint, stopping his run finally.

"Ah, he's stopped. Well that's goo- Centorea!?" Saitama looked to see the centaur covering her chest and her body frozen in place while her lower body continued on running unconsciously. "Seriously, you're frozen!? Hey, stop!"

Centorea crashed onto a pile of boxes, ceasing her movements as she lied dazed in the heap of cardboard. Saitama was flung out from his ride, crashing onto the metal door of a nearby garage. His body making a near perfect outlined hole of it as he was pushed inside.

Recovering, Centorea slowly sat up from the crash, panting. One arm covered her chest as she blushed. "Curse you… Playing with my body as you please…" The centaur looked down to her gigantic mammaries, both hands were on them as she remembered the unintentional groping Saitama had done. Her face heated up and breaths were hitched before she shook away any impure thoughts.

Looking at the Saitama made hole on the metal door, she was seething with fury. "Perverse deviant… I shall have your head!" Her declaration fell short as she attempted to grab her sword, only to find the sheath around her waist instead. "M-My blade?"

"You damn horse girl…" Centorea turned, seeing the thief covered in various amount of paints and holding her sword in his hand. His face was filled with rage and hatred as he gripped the handle of the blade tightly. "Ruining my day and making a fool outta me. I'll make you into sashimi slices!"

The thief held the sword from the side before swinging full speed at the centaur. Centorea closed her eyes, bracing for the cutting that will enact upon her body.

CHOMP!

A few seconds went by and Centorea slowly opened her eyes which shot wide as she saw a spectacle she would never thought of witnessing in her life.

As the blade of the sword of just mere inches away from her, Saitama came to the side and stopped it… by having his mouth and teeth clamping down at the glistening blade.

The thief looked in shock at the display, struggling to move the sword as much as he could only to never move an inch from the hero's toothy grip. "H-Hey, let go you freak!"

Grunting and feeling the edge of the sword nearly cutting the corners of his mouth, Saitama bit onto the blade as hard as he could causing it to break apart from his strength, shocking everyone.

The thief immediately dropped the broken sword, cowering in fear as he met the fiery gaze of the hero as he stood tall and promptly spat out the pieces of iron in his mouth. Centorea simply gazed in awe of the unusual yet heroic act he done.

Saitama slowly made his way towards the backing thief, his steps were threatening and full of violent intent. "All I wanted today was to go into the grocery store to fill my empty stomach and feed the girls back home." The hero's words were full of anger as he cracked his knuckles as he continued his approach. "And now you gone and made my day to be the worst. Anything you gotta say?"

The thief, in an act of desperation attempted to throw a punch at the hero only to have his face meet a hard jab that knocked the lights out of him. He slowly got to his knees and fell to the asphalt with a thud as Saitama sighed out in relief.

Looking behind him, he walked towards Centorea and held a hand out to her. "Wanna come with me? There's a half off sale today that I can't miss."

Touched by the sheer acts of her savior, the centaur warmly smiled up at him as she took his hand and slowly got up. Saitama, realizing her shirt was opened up completely then started to button up her shirt. "Shit, sorry sorry…"

Blushing at the generosity, Centorea only smiled as he allowed him to do so. "Do not worry… Master."

…

"It was rape!?" Saitama's face and voice was in pure disbelief and disgust as he listened to Smith over the phone. He was currently in his bedroom, his legs nearly flattering from under him as Smith gave him the details.

"Centaurs have a strict rule that only their masters who are fated to them can only ride on their backs. Think of it as a marriage proposal." Smith explained over the phone, simplifying the means and significance of riding on top of a centaur. Before she could say any further, she yelped at the task she was doing. "Ah! My yakisoba!"

His call was stopped, leaving the hero sweating profusely as what he had done.

The door of his bedroom creaked open and behind it was Centorea looking in.

Hearing her arrival, Saitama quickly turned around and went down on his hands and knees. His head swung down hard onto the wooden floor, nearly breaking through it if he hadn't held back. "I'm sorry, I'm sorry! It was pure accident I swear, please forgive me, Centorea!" The hero begged through comical tears as the centaur approached and got down to his level.

"Cerea…"

"Eh?" Saitama looked up from his apologizing, a noticeable red spot was on his forehead.

"Those close to me call me Cerea, so please refer to me so, Master…" The centaur calmly told him as her eyes looked to the side and cheeks were a soft crimson. "I should be the one apologizing for dragging to my selfish desire for justice."

The hero scratched the back of his head after rising up and sitting on his knees. "I mean, it's no worries at all. After all, what kind of hero would I be if I let that dude run freely stealing stuff?"

"It's fate that brought us together!" Cerea grabbed onto Saitama's free hand and placed it onto her large bosom where her beating heart was. "Like the meeting between the great Greek hero, Heracles and the wise Chiron, fate has tied us together!"

Saitama retreated his hand away as Cerea continued. "Truly, Japanese spells are strong to bring me such a master that risks his life in order to save me." The centaur gently gripped her hands onto Saitama's, her blue eyes never leaving the face of the hero. "It's the first time since coming to this country, no… since I was born that I had a man protect me so."

Saitama only blinked as she went on. "That is why I, Centorea Shianus swear my loyalty as a servant to you, Master. Do you accept these words…?"

"I… Cerea… Uh…"

"Wha- Darling, did you bring another girlfriend home!?" Saitama and Cerea looked to see Miia and Papi standing in the doorway, both were shocked at the new liminal living with them.

"Hubby, Papi is hungry!" The harpy shifted her anger into her empty stomach.

"'Darling'!? 'Hubby'!? Master, what is the meaning of this!?" Cerea inquired angrily to the hero before Miia chimed in.

"Don't tell me she's staying here with us, Darling! Two is enough!"

"And I'm hungry!"

Saitama slowly sank onto the floor as the three girls bickered amongst eachother, his arms hugging at his knees as he went into fetal position.

I just want a quiet life…

Percentage of hair on Saitama's head: 90%

And our fourth chapter is finished with Saitama now having Miia, Papi and Cerea all in his household!

Also, I hope you guys noticed that little cameo of Mumen Rider, just starting off as a bicycle riding cop before engaging himself to become a hero once I establish the Hero Association in future chapters. Look forward to many familiar faces that will make an appearance in later chapters from OPM, all connecting with Saitama in one way or another to keep the flow of the combined MonMusu universe together. Hopefully Saitama will reach to full potential once he meets his faithful cyborg sidekick.

I like to say that this story will have NO lemons whatsoever. As much as people want to see Saitama committing some down and dirty stuff with his harem of monster girls, it's just doesn't fit into his character personality plus since he's already breaking the law of fighting liminals who abuse it. Saitama is a character that lives for the fun of being a hero, that's all there is to it, so I apologize if any of you might have your interests faltering on this fanfic.

On another note, I'd like to announce that I will need a beta reader later in the year as I am going back to college to finish my education while also dealing with a retail job. Any of you can message me and do your best to convince me on why I should have you as beta reader. I'll pick one after every chapter or just stick to one that will help me out with them.

I wish you all a good night and hope your reviews are ones that are positive and critical.