Hello, It has been a while. Last time I updated was 10 January and a lot of things happened since then including Kamen Rider Build's Build New World released (and a lot of stuff contradict my fanfic), Haguto Precure ended with their movie, All-Stars Memories and Miracle Universe, released. Kamen Rider Zi-O ended and many more things.

That lot of thing happened to make me rethink, reread and reformulate my fanfic, but I won't change what I already write and what I already decided like how Sento didn't have any old Fullbottles and Pandora Box.

Will I adapt any new material? Honestly? I don't know since a lot of them clash with what I write and at this point, I will just shout, 'ALTERNATE UNIVERSE' if you point the contradiction. So let just see how to fit them later.

Ps, I still didn't dare to read any comment since I got some pretty bad feedback, but I will read them when the comment reaches 85.

Onto the story

Chapter 011

Curiosity Causes Convention

Sento blinked. He looked at the man in front of him, a grey-haired old man with a top hat decorated with gear and clock. This face seems familiar, but he can't remember.

"Oh, Sento-Kun, it has been a while," the old man said, "Well...you may not actually meet me yet this time."

"You do seem familiar, though," Sento said, "Actually, I remember you are one of Criasu company's employee that stole the gynoid under my nose."

"Now now, It is mine, to begin with, and you stole it first," The weird old-man continued, "But if you do feel familiar, you may remember the name Kaisei Mogami."

"you are..."

"Now, that would ruin the surprise, and if you care to remember, I am a villain, so I am not gonna start telling two-episode back story to you here in front of the door since your social link is not high enough yet," the old man forcefully entered Sento's house and then admiring the cafe, "For now, call me Dr Traum."

"Then tell me your reason for coming here?" Sento looked annoyed and cautious, but this old man didn't even radiate dangerous aura like other Criasu Company's employee.

"I want you to open your door on my creation," Dr Traum sat on one of the cafe chairs and then continued, "It isn't here, but if it did come, I hope you didn't blow its cover."

"It?" Sento's curiosity took control, but he quickly managed to rein it back, "Why do you come here to tell me that? I am telling you to know that I will do whatever to protect my students."

"And I know that. Controlling and manipulating mind is hard and even more so to a man as smart as yours. I will guarantee it's closeness to you will allow you to learn about my creation," Dr Traum stood and then tapped Sento's shoulder, "it is my failed creation, but it still has a use, and I am sure you can learn something from mine. I do learn a lot from you, after all."

The odd-looking man now exited the door, but Sento caught his shoulder and then asked him, "Why do you join Criasu Company? the way you talk, it's like you know me, but if you know me, I doubt I will let someone I know do something bad to the world."

"Well, Like I said, my social link isn't high, yet so I will not answer that," Dr Traum laughed and brushed aside Sento's hand with his cane, "So now, I will go~ ta ta~" he tapped on the ground with his cane and suddenly a weird looking robot appeared and put its big hand on the ground.

"That robot looks great," Sento praised, "It is better than what I used to fight against."

"Aha, you did tell me about that," Dr Traum smiled fondly, "Oh yeah, one last piece of information: in the future where I come from your friend never actually lost his power."

"what do you..." But Sento never got his answer because the weird-looking robot was fleed from his front door.

Sento sighed, and his cryptic message continues to haunt him for the rest of the day.

Sento facepalmed. There is a new student in his class. She looks younger, probably twelve years old, with lilac coloured short hair tied into low twin tail. She wore a middle-school uniform like Hana though, and that bewildered him.

"My name is Ruru Amour. An honorific is inefficient and thus, unnecessary. I may look younger than the rest of you, but I jumped year so please treat me no different."

Sento looked at the files on his hand, her age is definitely written as 12, two year younger than Hana and the rest of the class.

"Please take care of our homestay student~!" Hana chipped in.

Now Sento understands half of what Dr Traum saying, now he wondered what he should do.

"Well, as she said, treat her no different than your classmate," Sento said, "Amour may have few difficulties understanding Japanese culture, so please do note that."

He decided to just play along.

The class was now in an uproar with new cute student younger who manage to climb to their level faster. When Sento asked Ruru sat beside Hana, she complied obediently. He was a bit of worried about his students now.

"Lulu is totally amazing, you know!" Hana excitedly tells her parents about Lulu's accomplishment in school, "But all those boys confessed to her and all the sports teams scouting her, but she turned everyone down kinda seems like a shame."

Currently, Hana and her family plus Banjo and Hagu-tan have dinner and Hana excitedly retell what happened in the school. The girl looks expressionless, though, almost bored? No, maybe more unconcerned.

"I have no interest in such things," Ruru answered.

"Then, what are you interested in?" Banjo asked.

The lilac hair coloured girl didn't answer and decided to leave the table with 'thanks to the food' instead.

"Sento, you all right?" Harry asked from the door of the labs.

He was worried about how hard working the physics teacher currently is but somehow that guy have to smile on his face while working on his Build Driver. Frankly, that was a bit creepy. But it was a long time ago Hariham Harry learns to ignore that creepy side.

"You see, Harry, this morning we have a guest," Sento stopped his hand, "This man claimed to be Dr Traum. You know anything about him?"

Harry gritted his teeth, but he tried to remain calm and then answered, "That man is a counsellor and senior member in Criasu Company. He created many machine and robot as an engineer and scientist of Criasu. I have a bad encounter with him in the past and from that I know he has a great fascination with mechanical and technological artefacts," Harry looked at Sento and then added, "I start to think he is a bit familiar to him..."

"I see," Sento nodded, "I don't know what will happen in the future, Harry. But from what I gathered, he apparently knows the future me. What do you think happened to him?"

"I don't know, Sensei," Harry smiled weakly, "He experimented on us, it was torture, so my image of him isn't the best."

"Do you think he was a good man once?" Sento asked back.

Sadly, their conversation was stopped when Banjo and Hana entered the lab with Hagu-tan in tow. Banjo put a bento on the table and then looked at Sento.

"I think something wrong with Hana and the girls," Banjo started, "You said to look out at the new girl, but the way I see it something is wrong with Hana. I mean, we did see her before right? Older, yes. But she was that UFO girl right?"

"Banjo-san keeps asking me if I know that girl before, but I can't remember meeting her. I even checked Homare and Saaya-chan" Hana added.

"Someone manipulated your mind, Hana," Sento answered, "Probably to make you girls forgot you have met her before because she is in an enemy camp."

"Ru...ru...te...ki?" Hagu-tan looks confused.

"Yes, Hagu-tan, she is enemy," Sento confirmed the baby, "But I know why she is here: To learn you. now will you give her a chance?"

Hana looked at Banjo, clearly confused. But Banjo just shrugged, "It is your decision. you are the one who lives with her."

"You know Sensei, Ruru can do anything by herself, so I haven't been able to help her with anything, but now I know why she keeps following me around," Hana started, "She comes all the way to enrol to the school, so I think it would be more fun for her to make more friends."

"You aware she is from the enemy camp, right?" Banjo asked.

"Well, of course! but having a friend is great regardless who you are," Hana smiled, "Remember I blasted that Charalit guy?" Hana asked back which everyone nodded too, "his heart shouted he can't do anything, but I think that because no one is there to cheer him on. Charaleet needs a friend, and I think Ruru need a friend too."

"Good thinking," Sento nodded, satisfied, "tell Saaya and Homare too about your decision."

A week passed since Ruru joined the Nono Household. She was currently writing a report on her room.

"Have you ever wondered why and how Precure work? Why are they so strong? what made them tick and keep getting stronger?"

That question was still unanswered. Ruru was now allowed to work independently, to seek Precure's weakness but Cure Yell, identified as Nono Hana alone didn't have exceptional ability. She is not good at studying, she isn't athletics. So what is the source of that power?

Ruru stopped writing her report when she heard a noise. Maybe the Nono Sisters?

She stepped outside and then found Hana and Kotori sneaking around their room.

"Very well. then soon, I will approach Lulu and..."

"What do you intend to do with me?" Ruru asked from behind Hana.

"Well, you see..." Hana answered and then looked back, "Gah!" she and her sister were surprised and hugged each other.

"What are you two planning?" Ruru asked again, and then Hana and Kotori stopped shouting in surprise.

"Uh...how about you follow us?" Hana offered.

Ruru didn't understand the sisters' intention just followed along.

Dr Traum walked calmly toward his own lab, but he sees Evolt from another side, and in this hallway, they can't help but crossed path with each other. But when the two-men finally close to each other, Evolt suddenly asked, "What are you planning?"

The two men stopped their step, both of them not looking at each other. Dr Traum answered, "I don't think that is your problem. Just to remind you, I have a higher rank than you."

"DIdn't I tell you? I am interested in your creation," Evolt make a small laugh and then continued, "Maybe you scared I will take yours?"

Dr Traum glared at Evolt but decided to keep walking, "You overestimated yourself," and then walk away.

Evolt, on his part, laughed, "Of course I am overestimating myself!" he also continued walking away, "I am not human like you..."

The girls were feeling down. They organized a party for Ruru, a welcome party where there is a lot of food and a lot of friends. But Ruru said some remark and escaped the party, making Hana tried to manage the fallout. The pink-haired girl felt down now and the other two was now affected too.

"I guess some people don't like big parties like that," Saaya agreed, "But I don't think she hates us or anything."

"Aren't you tired around her?" Homare asked.

Hana was clearly felt down, but When Homare asked, it was clear she was more of concerned than sad.

"I am sure we will figures thing out," Hana answered.

Her two best friends were confused at first. Why is she so confident? But when Homare asked that, Hana couldn't answer.

"Hm...do you think what she did is to make us can't fight?" Saaya suggested.

"I am sure that wasn't the case," Hana replied, "Sensei told me before, Ruru is just curious. Hm...yeah! maybe it was that!" Hana jumped down from where she sat and then continued, "I think she just didn't understand us. She is a robot, remember?"

"What Sensei said still unbelievable," Homare commented, "But if that the case, she may have no malicious intent."

"Anyhow! I am sure we will figure it out!" Hana said optimistically, "our first job is to have her open to us and make her feel we are her friends!"

Ruru sat at the cafe. Her creator said that if she needed help, she should come here. The Naissance was comfortable, and the coffee was passable.

She didn't actually need a coffee or food, but her mini-body created as close as human, so Ruru can mimic human as close as possible so she can do that function.

The teacher then appeared and sat in front of her. The physics teacher, Kiryuu Sento, self-proclaimed handsome and brilliant physics teacher.

"So, something I need to help with?" the teacher asked.

"I don't understand why you helping me," Ruru started, "You are Kamen Rider Build, right? I belong to Criasu Company so shouldn't I pose a danger to you?"

"Your father asked nicely to not attack you," Sento replied.

"That man is just my creator," Ruru quickly denied that.

"Regardless, You are now my student and as such fall under my protection," Sento answered, "And I know as a student, you need my guidance. Just because you smart doesn't mean you know anything."

"Yes," Ruru nodded, "Your conjecture about I didn't know everything is right, but I don't understand why. I am here to seek the answer to the question you pose to me long ago, and I make a conjecture that observing Nono Hana and her friends will lead me to the answer, and yet it didn't."

"You need time and patient to get the answer," the Physics teacher answered, "even Human can't understand another human easily."

"Why can't you just give me an answer?' Ruru asked.

Sento stood and give a smirk, "Because I am a teacher, I can't just give my student an answer. I am a handsome and brilliant physics teacher, giving an easy answer is not my way."

Ruru just gave up and then walked out of the cafe after paying her drink. Maybe she just needs to observe longer, and if the robot found the weakness of the Precures and the Kamen Riders, perhaps the physics teacher would regret his decision not answering Ruru's question.

Outside, the sky darkened, and the atmosphere changed. Along with the change of the atmosphere in the shopping district, the Precures's necklace was blinking.

The three girls, along with Harry and Hagu-tan, finally met up and looked at the shopping district.

"Kotori said Lulu headed that way," Hana said, "Is she have anything to do with this?"

"Might be," Harry said, "She is still Criasu Company employee, so she needs to gather Togepower too."

"Then, we should stop her!" Hana took out her Preheart, and the two girls followed.

"Mirai Crystal!"

Hana, Saaya and Homare put the Mirai Crystal in their Preheart.

"MY HEART! LET IT SHINE!"

The light now surrounding the girls and changing their regular clothes into their Pretty Cure dress. Followed by that, Hana's hair grows longer and wavier while turned into bright pink. Homare's hair turned into golden yellow and grows in length, tied up into ponytail held together by spiky yellow hairpiece with two star-shaped clips decorating them. Meanwhile, Saaya also has her hair long but even more layered, her hair now was sky blue with white headband resembling nurse cap decorating her head.

The three of them then took a pose and announced their catchphrase.

"Embrace your shining future!" Hana announced, "Cheer on the world Precure of spirit! Cure Yell!"

"Embrace your shining future!" Saaya announced, "Heal the world! Cure of wisdom, Cure Ange!"

"Embrace your shining future!" Homare announced, "Light up the world! The cure of strength! Cure Etoile!"

The three of them then jumped toward the source of trouble.

"hoo...hooo...What we have here..." Evolt was pretty surprised to see that little doll was here.

"Evolt-sama," Ruru replied while giving a bow.

"What are you doing here, little doll?" Evolt asked.

Not realizing the insult, Ruru replied, "I try to understand Nono Hana and other Precures. What makes them strong, but observation didn't seem to work, so I revert to the previous mean of measuring their strength."

Ruru looked at the Smartphone Oshimaida. It was created from a high school boy who put all his money to a Gacha game but didn't get SSR he wanted. The regret of spending money and the bitterness of not getting what he wishes turned the Togepower inside him into Smartphone Oshimaida.

"You can't simply measure strength with battle, little doll," Evolt answered, "You need to put them in a difficult situation and learn how they will overcome that. I find how human always overcome problem...educative,"

Evolt took his Transteam gun and put Wolf Toge Bottle and then shoot it toward the Oshimaida.

"Matchi Oshimai daaa~!" the Oshimaida shouted and soon, the Smartphone Oshimaida evolved. It now has wolf head and limbs but still with body of Smartphone, "Matchi Oshimaidaaaaa~."

"What are you doing?" Lulu asked.

"Making them more dangerous, of course!" Evolt laughed.

"Lulu~! I know you are here! where are you!?" Cure Yell shouted his heart out, "I know you are the one who makes the..." She was interrupted when a giant claw of Matchi Oshimaida attacked her, but Cure yell easily dodged them, and soon her friend joined her.

"Yell, this Oshimaida seems different," Cure Etoile said, "Please don't' rush by yourself."

"But I can't help but worried," Yell replied.

The Matchi Oshimaida attacked again though. The Matchi Oshimaida didn't care about Hana's intention and attacked wildly. Her two friends caught both claws from each of Hana's side and Hana jumped, kicked the wolf's head. The Matchi Oshimaida almost fall, but from the screen of its smartphone body, a cable appeared and then caught Yell and throw her away.

"Henshin!"

"Cross-Z Magma! Are you ready? Gokunetsu kinniku! Cross-Z Magma! Achachachachachacha Acha!"

Suddenly Cross-Z appeared and caught Hana. Banjo sighed in relief after he manages to caught the pink Pretty Cure and soon landed. In the distance, he can see Cure Etoile and Cure Ange try to fight off the new type of monster, so he wasn't worry-free.

"You okay?" The red hot Kamen Rider asked.

"I am fine, thank you," Yell replied, "Anyway, I tried to find Ruru. Can Banjo-san fly and try to find her?"

"You don't need to do that..." Suddenly Evolt landed in front of Cross-Z and Cure Yell. With him, there was a small girl with lilac-coloured hair but an all-black themed dress.

"Ruru!" Yell shouted in worry.

"Foolish girl, Don't you realize she is your enemy?" Evolt asked with anger, "She created half of that monster to analyze you, to seek your weakness, why are you worried about her?"

"I was worried about her, what is wrong with that?" Cure Yell declared.

"And for such feeling, you would risk injuring yourself all for nothing?" Ruru asked, "I am the one who hurt people here, why are you still worried about me? don't you realize the futilities of your action."

"It's not futile," Cure Yell makes a smile, "I got to talk to you here. I will ask you why you do these horrible things, I will try to understand. I just wanted so much to make you feel welcome and happy. If we know each other better, don't you think I can make you stop what you are doing, creating these monster that hurt others."

"Hahahahahaha," Evolt laughed, "Human is entertaining. It never ceases to amaze me how ridiculous you are. Banjo, have you ever try to understand me like that foolish child do?"

"Of course not," Banjo admitted, "You aren't human, and I am an idiot. I left the job of worrying and thinking to Sento since a long time ago. But if he is here, he will say this: You are too far gone, but Ruru is still can be saved, and this time the one who did the saving is this girl," The Kamen Rider patted Cure Yell.

"Lulu, You still have a chance," Cure Yell declared, "You can do everything in your power to prove me wrong, and I will do everything in my power to stop you. I will get you on my side! I know we are completely different, but I am sure I will figure it all out."

"Why are you doing that so much for me?" Ruru asked.

"Because I like you," Yell answered simply and at that Ruru feel her first warm of humanity.

"Well, Little Doll, what will you do?" Evolt asked.

They were interrupted, however, when the giant Matchi Oshimaida was thrown on their way. Cross-Z quickly Carry Yell away while both Criasu Company's employee escaped the battle with their own way. The two Pretty Cures landed and looked at Hana.

"Yell, Did you find Ruru?" Cure Etoile asked.

"I did, but I am not sure if my word goes through her head," Cure yell answered.

"Well, we can see about that later," Cross-Z pulls out the Magma Knuckle from his Build Driver, "Now, focus on the enemy ahead. I will destroy the Fullbottles inside, you girls finish it off. It is your job, after all."

"Will it work?" Cure Ange asked, clearly worried.

"My guts tell me it will work," Cross-Z then pressed the front of his Magma Knuckle.

"Ready, go! Volcanic Attack! Acha!" the Magma Knuckle declared, fire gathered around Kamen Rider Cross-Z, and soon the fire gets hotter. Cross-Z Magma then launched a rapid series of flaming punches before becoming covered in lava and delivering a final blow that strong enough to shatter the wolf part of the Matchi Oshimaida.

"Oshimaidaaaaaa~" the now smartphone Oshimaida tried to stand again, clearly hurt by Cross-Z punch, but not giving up.

"Now, It is our turn!" Cure Yell shouted.

The Precures then summoned their own Melody Sword and Mirai Crystals.

"Mirai Crystal!" The Mirai Crystal in their hand then inserted into the Melody sword.

Asupower was overflowing, and their heart feels warm. They have then recited the name of their personal Melody Sword.

"Yell Takt!" Cure Yell announced.

"Ange Harp!" Cure Ange announced.

"Etoile Flute!" Cure Etoile announced.

The three then summoned large symbols before them: blue harp for Ange, pink G Clef for Yell and a yellow flute for Étoile. Yell runs her fingers along the row of rainbow buttons and waves her tact like a conductors baton. As in on cue, Ange and Étoile to start playing their instruments. Waving her arms, Yell summons a lot of Asupower before them and forming it into a ball. With all three Cures holding their swords out, they called:

"Be free, thorns of the heart! Pretty Cure・Trinity・Concert! "

The crystals at the end of their swords change from pink to blue to yellow, sending the Asupower straight towards the Smartphone Oshimaida, eliminating any thorns that may have been in their heart and turned them into a beautiful tree.

"We will fully send our resignation~," The Oshimaida said with joyful voice while floating away.

"HUGtto! Pretty Cure! Yell・For・You!" the Precures finished.

Cross-Z deactivated his transformation and then pulled out the Asupower gun, the gun had a cylinder barrel and coloured red and pink. In its handle, there was a revolver, but instead bullet, Banjo opened the revolver chamber, put an empty Fullbottle on it and closed it again. Cross-Z. Seeing as he still can see glittering Asupower after the first use, Banjo did the same thing the second time.

From this battle, they recovered two Fullbottles: A Smartphone Fullbottles and A Wolf Fullbottles. Just what happened? Maybe he needs to consult to Sento.

The night comes, and the girl goes home. Homare and Saaya heard what happened between Hana, Banjou, Ruru and Evolt. Evolt look more amused by what happened and praised humanities as if he isn't human. But Hana worried what she said didn't go through and knowing the girls aware of Ruru's motive living with Hana will make her go away.

"I am sure you will be all right," Banjo said with a reassuring smile, "Sento assured me that Ruru won't go back for a while. But I don't know why..." Banjo scratches his head.

But Hana found that what the older man said was true. When he reaches home, Ruru sat on her bed, waiting for her.

"Ruru!" Hana shouted and hugged the smaller girl.

"Everything about you isn't logical," Ruru declared, "You are aware I am enemy, and yet you embrace me so. That is why I am here to continue my investigation."

"Well, ~!" Hana smiled brightly, "I am sure I can pull you on our side as long as we have a chance to talk."

It was the start of Ruru's journey to understanding Hana, to understanding humanities. Evolt has said that Humanities are amusing, but didn't elaborate on why. Both of Ruru and Evolt are not human, so maybe they will have a similar conclusion?

Sento was currently looking at Hagu-tan who played with the new Fullbottles. The Smartphone and The Wolf. Thankfully the baby didn't bite on it, but Sento wants to know if the Fullbotlles will react to her. She shows that sometimes she can affect Asupower, but after waiting several minutes, nothing happened. He, along with Harry and Banjo was now in the laboratory and beside him, there was a lot of things Sento owned, both finished and unfinished. Sento's defunct Build Driver was still there unopened, followed by the Sparkling Fullbottles, Hazard Trigger and Genious Fullbottle.

"Well...I think I will let her play with that for now," Sento said, "You said there is a new type of Oshimaida?" Sento looked at Harry and Banjo now.

"Yeah, it said 'Machi Oshimaida~' over and over again, so I am sure that was its name," Harry answered, "But the girls and Banjo manage to trounce it so maybe it wasn't that strong."

"It wasn't strong, but it needs to be defeated two times: Once with Rider System, and once more with Asupower attack," Sento analyzed, "So maybe Evolt make it similar to Smash. I won't know until I see it myself."

Sento stood out, but his hand accidentally shoved the Hazard Trigger out of the table. Hagu-tan looked at the black device, and before any of the adults react, the baby took it and pushed it toward her mouth.

"Hagu-tan..."

No one knows who said that last word before the room engulfed in the bright light of Asupower blinding their eyes.

This chapter goes beyond my plan. When I began writing this chapter, my plan was just to make Hana, Homare and Saaya to not aware that the 12 years old Ruru was the same Gynoid they caught in Chapter 07, but writing them down, my plan changed without I realizing it and now this is a game of trying to convince Ruru to be in their side. Regardless, I am just glad I am done with this chapter and finally I manage to continue this fanfic. If you notice, I skipped over the party in episode 13. Why? Because I doubt I can write them down so if you will the scene jumped to after the party, forgive me.

Special thank you for Haseo55 and Farhan Nugraha for PM-ing me to motivate me continuing this. I thank you all for everyone who want me to continue me in the comments, now I already did, I hope you keep looking forward to the continuation of this fanfic.

Ruru now officially joined the cast but still not convinced, how will Hana and co pull Ruru to protagonist side? what did Evolt plan that now he can make new Oshimaida? Will Emiru appeared again in the next chapter? What happened to Hazard Trigger? Did getting chomped by a baby will turn Hazard Trigger into something else? will Sento manage to repair his Build Driver?

Look Forward to the next chapter~~