In the Alternate Universe, Natsu Fernandez was the son of Erza Belserion and Jellal Fernandez, he also attended the junior and senior high school which Erza worked as its Headmaster, initially, Natsu perceived Erza was nothing more than a strict and bland woman, until one day he encountered her while she was changing her cloth, a healthy man he was, Natsu couldn't help but mesmerizing at his mother's figure, blooming a forbidden feeling that he knew he shouldn't have, what would Natsu do to handle the situation? How his feeling for Erza would change the mother and son relationship for the rest of their life?

My name was Natsu Fernandez, I lived in a coastal county-level city called Magnolia, it wasn't large, but the economy's situation was quite good.

I was 16 this year, studying at Fairy Tail's academy, the school had both Junior and Senior department, and I was in the last semester of the third-grade junior. As for my academic score, I was among those who didn't particularly do well... I even had a copy of the answer for the test but still not good enough... I didn't know why though, maybe the answers were fake or God didn't want a cheater got a good result, so yeah whatever.

Anyway, my height was 179, almost breaking 180 cm, I could be said among the tallest boy and my overall appearance was average; My nose was heroic and upright, although my skin was not fair, I was very healthy. Between eyebrows revealed a great sense of integrity, maybe because of the martial arts that I practiced from an elder at my Grandfather's village back when I was a kid.

Oh, and I also have a secret about my body, something that not even my parents knew about, it was my cock.

At this age, my cock actually grew to 22 cm with the width reached 12 cm, the upper and lower thickness was 8 cm deep. When it got erected, the normal triangle type of underwear would unable to hold it back and left me not comfortable, and since then I always wore the four corner type.

Many people thought for me to have a big cock would be the most prideful thing, but I was not, it's because I was a bit introverted. Because it was very big, I always went to the bathroom at school only after the class was about to start, I was afraid for others to look at me differently after seeing my cock.

Even at home, I always closed the door tightly, therefore, none of my parents knew about my circumstance.

Honestly, the circumstance of my cock wasn't natural, blamed my ignorant attitude when I was still a kid, I ate a strange plant inside the cave nearby the forest when I visited my Grandfather's village, the shape like a mushroom but also not at the same time, very mysterious, I thought I stumbled upon a magical treasure from the old stories that Grandfather used to tell, something about giving me the superpower of slaying dragon or something, so I was very excited and Immediately ate the plant...

Welp, anyone could guess what happened next, I felt terrible; my whole body became hot on the way back to the village and fainted nearby Grandpa's house, I was lucky though not fainting in the forest, with so many woods, it was not easy to find someone in it.

My Grandfather was scared to death, but there was no hospital in the village, and it was far too remote from the city, my Grandfather could only bring me to an elder in the village, he was a healer, his name was Igneel, I practiced martial arts from him.

Anyway, Igneel said that the thing I ate wasn't poison, but a super-powerful medicine, anyone who was eating it normally would die of fever as they were unable to bear the effects of the medicine.

I was so scared that my face was pale, luckily Igneel knew how to treat the medicine, but he was unable to completely heal me, so the rest of the medicine must be digested by myself, but every week within a year, I had to be treated by Igneel's treatment again.

During the course of time, I always felt my dick was hot every night, I told about this to Igneel but he just smiled and gave me weird eyes, I only understood his meaning in the recent years when I realized my cock was much bigger than other men.

But I couldn't complain to anyone at the moment, not only it was my foolishness, but Igneel had died a long time ago, in the same year with my grandpa, blessed them both.

Since my grandfather passed away, my parents took me home until today, my father called Jellal Fernandez, working as a long-distance bus driver, and often was not at home. He was kind and stern, hit me if I had done something wrong though, but wouldn't hesitate to fulfill my wish if I ever had one. He was 182, had a very thick and tall body, bringing a sense of security whenever he was at home, I wondered if my mother interested in him because of that.

As for my mother... I could only give a sigh...

Her name was Erza Belserion, she's a deputy principal of the first middle school I went to, focusing on grades. Mother was always a conservative and traditional woman, an influence from her family, naturally, her behavior affected the way she wore her dress. She tended to wear professional attire or an ordinary shirt and trousers, rare for me to see Mother wearing a skirt, even when she did, it was down all the way to the sole of her foot, making no one knew what kind of appearance her legs were, even as her son, I had no idea.

Honestly, Mother was gorgeous, her red hair and fair skin, slightly tanned, but she wore a pair of thick black-framed glasses to cover it up. As for the size of her bust, no idea, it's not small I guaranteed that, but her conservative professional attire made people hard to measure.

Although on several occasions, there was this scene where I saw her sitting down, the buttons of the shirt collar actually unclasped automatically, she usually would frown and re-button it.

I really didn't understand her, not only she wore so tightly outside, but also while she was at home, wearing a narrow skirt while covering her legs with stockings.

I afraid other than father and grandparents, no one had ever seen my mother's true figure.

Anyway, her life as the vice-principal might be prestigious and domineering, but actually had a lot of pressure and alertness, many people were eyeing such position, once she revealed any kind of blunder such as accepting a bribe, those people would take advantage to replace her, and her career possibly would be over.

Thankfully that my mother was an upright and honorable person, disdained to do these things, but in the consequence, her wage wasn't particularly great, just basic salary and few bonuses, but I still could have a decent life and lived in a pretty good house, much better than the life of many white-collar workers in the city.

One afternoon, Natsu just got home from the school, he founded Erza arrived at home early.

Even in school, Erza and Natsu were rarely seen together, she said it was to avoid any rumor and prevent Natsu from having a sense of superiority due to her title.

What a serious mother...

Erza at the moment wore a different set of clothing she wore in the morning, Natsu thought it was perhaps because of the weather, it was quite hot in April.

The pair of the breast with unknown size tightly wrapped behind the clothes that reached to her neckline, the lower body was wearing a gray ordinary skirt, showing half of the slender and white calf. Her lotus-like feet slipped inside a pair of flat sandals, Natsu never saw Erza's wearing high heels since he was a child, she even went to work with small leather shoes.

Erza looked up at Natsu and said, "Natsu, come with me to the mall."

"What are you buying?" Natsu startled, it was because Erza was rarely shopping.

"I have to attend a special lecture tomorrow, I need to buy new shirts to make a good impression on some people."

"Uuh... alright," Natsu nodded, he went into his room first and dropped his bag, then they both went out.

Not long after, Natsu and Erza arrived at the mall, she already had a familiar store to go, taking him directly into it.

"Erza, it's been a long time, oh, is that Natsu? He has grown up nicely."

The owner of this shop was a middle-aged woman called Mirajane, the same age as Erza.

"Hi, Mira, wow, you look more beautiful than the last time I saw you," Erza said with a little smile.

"Oh, stop it, nothing change, you just happen doesn't see me for quite a while," Mirajane waved her hand and giggled.

"Perhaps, Natsu, come greet Aunt Mira," Erza pushed Natsu gently on his back.

"Hi, Aunt Mira, how are you?" I nodded my head and said politely.

"Well, I am fine, thank you for asking, Natsu is on the 3rd years of junior high school, right? My daughter Yukino also the same..."

We chatted a bit short before Erza strolled around the shop, Mirajane looked her from top to bottom, then said, "Erza, I honestly still can't figure it out why you wear so plain and uptight, your figure is obviously very good, it feels like you waste God's gift,"

"What for? Giving a free treat for some perverts? As long as my husband knows, it is enough for me."

"Then do it for your husband, he must have been also wanted to see you in sexy dress..."

"He had seen me naked, what difference does it make?"

On the side, Natsu couldn't help but wanted to complain, in the face of a woman with no sex appeal, which man could actually bear? Sure, naked was good, but wearing those kinds of clothing gave a different sense of feeling, as for why Natsu knew such a thing... well, he's a young boy.

After a while in the store, Erza picked a brighter top into the fitting room, and Natsu found a corner outside to play with his phone. Mirajane busied with other customers.

While playing 'Cat Catch Fish', Natsu suddenly heard Erza's voice, she said, "Natsu, can you please get Aunt Mira?"

Natsu closed his phone and put it inside his pocket, standing from the chair and looked around the store, but no one was actually inside at the moment, Mirajane such leaving alone her store like this, didn't she fear a thief?

"Mom, I can't find Aunt Mira..."

There was a silence in the fitting room, and then Erza said, "Come inside, Natsu."

"Hmm?" Natsu was flabbergasted, he couldn't believe Erza was actually asking him to enter the fitting room, this was the first time on his life that ever happened, at home, his mother always shut the door when changing clothes.

"Are you sure, Mom?"

"Yes, come help mother..."

After a brief hesitation, Natsu walked into the fitting room, he saw Erza shyly covered her chest, but the small shoulders above were exposed to the air. She was half wearing the bright colored long dress she just took in.

"Natsu, the zipper stuck..."

At this moment, Natsu's eyes stared on the purple lace bra that wrapped her breast, which was big... what size of a breast needed such a big bra? Despite Erza blocked the cleavage in the middle with her hand, but some leftover still popped out and exposed to Natsu's eyes.

Erza felt Natsu was staring at her, couldn't help but feel embarrassed, her face turned bright red. For so long she had defended her body, it was finally seen by Natsu today, making him the second man to see her inner skin, even only a bit, but conservative she was, this already shook her traditional idea.

Normally, when she was looking for new clothes, she always attentive and careful about the bust's size, but today she didn't know why she could make a blunder, forgot to check at the size of the bust above, thus when she tried to put back the dress, the zipper broke. Of course, she didn't have an idea to ask for Natsu's help at first, but she wouldn't know when Mirajane came back, and she was not comfortable wearing a dress in the state like this, therefore, Natsu was the only option she had.

Although her son's age has reached puberty, in Erza's heart, she always still considered him a child.

But she did not expect Natsu would stare at herself straight after he came in, she did not expect that in her age like this, she could still attract her son to this point. Erza couldn't describe the shyness brimming in her heart.

What also important was Erza had taken off her old black-framed glasses, exposing the genuine charming beauty that had always been hidden from the world, this made Natsu truly shocked, could not come back to reality for some time.

Helpless with the situation, Erza shyly shouted, "Natsu, what are you doing still standing there? Quick, help mother!"

Natsu awake and quickly went inside, he cursed himself in the heart, Erza was his mother, how could he have such a thought about her...

But even so, Natsu couldn't control the strange feeling inside his heart. He walked to his mother's back, looking at the fair color cavity bones exposed in the air, the smoothness of the surface of her skin, just watching them made Natsu hard to breath. A few seconds to control himself, Natsu took a few deep breaths and expelled the evil thoughts from his mind. He started to pull down the zipper gently...

It took some time, a bit up and down, but the moment Natsu succeeded, his head happened to lift up, and due to the position, he managed to see Erza's breast, the deep white breast in the purple lace bra was so visually stimulating that his cock couldn't help but swell and created a large tent on his pants. The sheerness of its size, and the fact that Natsu was standing behind Erza, it prod against her ass.

The strong feeling of meat was conveyed through his meat stick, and the blood inside as if boiling strongly, his mind was full of thoughts about trying to press his mother under him.

Erza was naturally also feeling it, the moment fiery heat from Natsu's cock touched her ass, she instantly hot and almost lost her mind.

Thinking that a man, other than her husband actually placing his cock on her ass, moreover this man was her own son, she was angry and annoyed, said, "Get out!"

As someone who had been living with her for a long time, Natsu recognized the tone she let out, he knew that he was doing something wrong, thus he left as soon as possible.

After waiting for a while, Erza came out from the fitting room, didn't say anything, and Natsu also didn't dare to mention it, both of them fell into an awkward silence. For a long time, Mirajane came back, did not notice anything strange between the mother and son.

Upon receiving the dress, Mirajane smiled and said, "Erza, are you ok with the size? Or is it too tight in 'that' part?"

Erza had not completely calmed down yet, her face was actually red, she made a small nod.

"Haha, alright then, let me fix for you, but I must say, Jellal is a pretty blissful man."

This saying, Erza became more flustered, she stiffly lifted the corner of her lips and gave the dress to Mirajane.

Less than half an hour, Mirajane had completed fixing the dress, her craftsmanship was really good, there was no trace of any modification, no wonder his mother would come to her every time she bought clothes.

On the way home, Natsu only decline his face, silent, but he couldn't bear it after so long, thus initiatively said, "Mom, sorry..."

Hearing my voice, Erza startled, didn't expect him to apologize, she sighed and said, "It's okay, it is me who forget that you have grown up, even Aunt Mira noticed it."

The fiery sensation of his son cock once again appeared in Erza's mind, two bright reds stamped her pair of the fine cheek.

She cursed herself for thinking such dirty think, let alone the object was Natsu, but on the surface, she said indifferently, "It's an accident, let's just forget about it."

Natsu nodded, but could he?

Erza's delicate face...

The pair of big breasts...

The plump and soft buttocks...

Could he really forget all of them?

Natsu looked at the perfect curve back of his mother, thinking about what was going to happen in the future...