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OPM: It's Hero time

After getting hit by Truck~kun, Ren Nakamura reincarnated in one punch man world. Stuck in a crazy world where life can end by simply going out for a grocery walk, MC decide to change the world for the better. ... SI (Self-insert) No harem. ... My first fan-fic. 1 chapter per day. ... Author note. I've read many OPM fan-fic some good some bad and realize in OPM why do you need an overpowered ability? since you'll never be as strong as Saitama or why do u even need to be as strong as Saitama, so I made this book, I don't know if it will turn out good or bad, I guess we'll find out in time.

Rovontheus · Anime und Comics
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15 Chs

Plan for the future.

A-City

In a quiet area filled with lush greenery and tall trees, there stood a large gate.

The word "Nakamura" was beautifully written in kanji at the top, surrounded by strong fencing that made it look even more impressive.

As you walked through the gate, various buildings came into view, each with its own unique style.

Some buildings had ancient designs that told stories of the past, while others were modern and luxurious.

At the center of this area was the main house.

Ren found himself in a library, surrounded by towering bookshelves that seemed to stretch on forever.

He picked a book at random from one of the shelves. As he quickly skimmed through the two hundred pages in under a few seconds.

He was amazed by how fast he absorbed the information.

It felt like he was gaining profound insights with every moment.

"I never thought it would be this effective," he thought, his mind racing.

As he focused on the surrounding room, time seemed to freeze while his thoughts spun, processing everything he saw.

A rush of excitement surged through him, sparking an impulsive desire to smash something nearby.

With determination, he grabbed a metal screw from his toolbox and, with a powerful swing, brought his fist down.

It felt like it took forever to make contact.

Bang!

"Ouch!" The sudden pain snapped him back to reality. He looked at his slender palm, now red, and winced.

But as he gazed at the bent screw, his expression shifted from pain to laughter.

"Looks like I've gained accelerated thought processing and my super strength is manifesting slowly" he chuckled.

"At this rate, I'll be able to learn and understand many subject in a matter of days. I just need to explore it more and find out its limit."

Ren spent the rest of the day testing his new abilities, becoming more aware of his potential.

After some reflection, he realized he could learn at an astonishing speed and understand it without any negative effects.

However, after using his accelerated thinking ability for a few minutes, he felt a wave of tiredness wash over him, along with a thirst that hinted at dehydration.

"It seems my body hasn't fully adjusted yet. I'm still growing, so I can't push myself too hard, or it might backfire," he thought.

"But with my healing factor, it should have negated the side effects, but why is it so slow?" Ren contemplated.

He looked at the small cut on his finger, it took a few minutes for it to heal.

'Low quality healing factor? Ah, right, perhaps it's due to the radiation' he ponders.

"Hmmm, I guess I'll focus on my studies for now and wait for my body to fully adapt to this radiation."

"Super strength and telekinesis, huh? Not bad," he said, excitement lighting up his face.

.....

Nada Public High School

4th Floor, Class 12-A

On the fourth floor of Nada High School, a middle-aged teacher with glasses squinted at his noisy students, his patience wearing thin.

"Silence, class!" he shouted, his glare silencing the commotion. "I have an important announcement. We have a new transfer student, and I'd like to introduce him."

"You can come in now," the teacher called, gesturing toward the door.

The entire class turned to see the door slide open. The backbenchers exchanged confused looks, unable to spot the newcomer.

Whispers of surprise filled the room as the new student approached the teacher's desk and faced the class.

"Hello everyone, my name is Ren Nakamura. I hope you'll all take care of me," he said cheerfully, bowing slightly.

The classroom erupted into chaos. Students were surprised to see a small, slender boy standing among them.

"Now, now, everyone, calm down," the teacher said loudly. "I know you're curious, but questions can wait. Let's find a seat for Ren-kun." He pointed to a desk at the front where another student sat.

"Riku, please move to the back and let Ren-chan sit here from now on," he instructed firmly.

Ren felt a twinge of annoyance at being assigned to the front row. "It's fine, teacher, umm…?"

"It's Satoshi. You can call me Mr. Satoshi, or just Teacher is fine too," the teacher replied, eyeing Ren's small frame.

"Teacher, I'd prefer to sit at the back. I don't want to disturb the class," Ren insisted.

"Alright then. If you want to change seats later, just let me know," Satoshi said, beginning the class by introducing each student one by one.

.....

Ren's POV.

As the day went on, Ren quickly got to know his classmates. Each student had a unique personality, showing that the school attracted bright minds from different cities.

To his relief, he found that he wasn't bullied at all, making his preemptive stun gun unnecessary.

"Well, in a crazy world like OPM, it's better to be overly cautious. Who knows? A Godzilla-sized monster might step on me without even noticing," he thought.

Although monster attacks were rare for now, Ren knew they would increase dramatically before the cannon started.

Thinking about Child Emperor, a young boy as an S-rank hero with his own base.

Ren felt inspired. "I think I can start the Earth's Guardian program soon. But I'll need a lot of money for that. How can I make a fortune?"

He considered technological advancements, but quickly realized he lacked the necessary materials.

"Should I develop my aunt's pharmaceutical company and introduce new medicines? I'll need to study biology and chemistry in depth"

"With my inheritance as a start-up, I should start a new company focusing on technology and medical science development."

"I don't feel like working under anyone, so I'll have to find people to work alongside me.....sigh"

"So much work to do. Studying is fun with a brain like mine, but it still feels tiring."

"School might be a waste of time, but it's much better than studying all day at home.

I think I'll like it here more than I initially thought."

.....

"Ren!" his aunt's voice broke through his thoughts.

"What? Is something wrong, Oba-san?" Ren asked, snapping back to reality.

"Stop spacing out and finish your food," she chided gently. "So, how was your first day at school?"

"It was fun, way better than I expected," he replied, a smile spreading across his face.

"Oh, that's good! You should attend regularly. Tomorrow, I'll get a housemaid for you. She'll take care of you while I'm not around," Aki said, her tone warm and caring.

"Okay! By the way, Oba-san, can you bring me books about biology and chemistry from renowned doctors? Even theories or samples will do. Oh, and the research data from your company too," Ren requested eagerly.

"Aww, Ren-chan, are you interested in becoming a scientist?" she asked, pretending to be sad.

"Aren't you interested in your aunt's work? There are so many books in my library on various subjects."

"I've skimmed through most of them, and I mostly need the books to determine which particular subject I'll invest my time in," Ren explained.

He wanted the right resources to make his life easier; although the internet had a lot of information, it also contained a good deal of fake information.

"But why do you need the research data? There's an overwhelming amount of information there; it will take you a long time to understand it," his aunt said, her expression puzzled.

"Aunt, I've read most of your books about AMR 9100. I believe that with an 18% dosage of Tacrolimus, it might increase the healing process by 87%," Ren said with a chuckle.

"Huh? How did you know that? We only figured out this method a few months ago," she asked, incredulous.

"I read your theory a few weeks ago, which piqued my curiosity. I simulated it in my head for weeks and came up with that," Ren replied, a smirk playing on his lips.

"Incredible! Truly…" she exclaimed, excitement lighting up her face.

She began to ask him about his perspectives on various theories and practical applications.

"Ren-chan, I think you'll revolutionize the pharmaceutical industry," she said, awe evident in her voice.

"But before that, you need to study it in-depth. It's easy to make mistakes in any field, and you lack experience, even if your theory sounds solid."

"Don't worry, Aunt. I'll be cautious," Ren assured her, meeting her gaze earnestly.

"Okay then, we'll test your theory once I find time in my schedule," she said, glancing at him with a mix of pride and concern.

"By the way, Aunt, we should set up a lab inside the compound. I want to create some cool stuff, and it's inconvenient without proper equipment," Ren suggested suddenly.

"What do you want to make?" she asked, curiosity piqued.

"I just want to build a computer and create some mechanical toys, made from metal," Ren replied, maintaining a poker face.

"Alright, I'll hire people tomorrow, but you have to show me what you've made," she said with a doting smile.

As the sun began to set, casting a warm orange glow over the city.

_____

Author's note.

I've Re-edited a few mistake in chapter 3.

Thanks for the heads up @UnderwaterDreamer.