6 years later…

In Japan, there was a masked teenager jumping from rooftop to rooftop, it was currently nighttime and he looked like a white blur because of his bright whiteish red costume and running speed.

This teenager was naturally a more mature looking Oki, who was looking for his food of the day. After not finding anything, he was naturally bored, but before he started to lose his patience, his running gave fruit, Oki found a skinny man threatening a kid to follow him or else…

Oki was no saint, but what the man did gave him an excuse to eat him without any guilt or remorse. Oki jumped down from the rooftop he was in and landed on the attacker, effectively pushing him away from the kid.

After making sure the kid was alright, he quickly told him, "Kid, run to the nearest police station, it's currently left, right, straight, right, right, left, straight, left, straight, right, left, straight, of here, understood?" Oki seriously said to the kid.

"Uhhhhh" The scared kid was having his brain fried from the directions which left him standing there like a zombie. Oki just looked at him in confusion and screamed at him, "Just get out of here!"

The kid understood the message and stopped standing there like an idiot before running for his life.

"What the fuck are you doing?! I'll fucking kill you, you fucker" The skinny villain screamed in rage.

Oki knew that it was useless to talk to dead people so he rushed in without hesitation to kill this man and eat him. Strangely enough, Oki didn't use his kagune and just used basic Muay Thai to finish the man.

The villain was obviously very unexperienced in the art of combat, he received the beating of his life and was currently looking like a bloated tomato. Oki thought that the battle was over and was about to finish him but something unexpected happened.

"Hahahahahha!!" The villain laughed maniacally before saying, "You fool, did you think it was this easy to defeat me, I have yet to show my quirk, my true power!! Hehehe."

Oki stopped his devastatingly strong punch midway after hearing the villain's boasting as he was curious of the villain's attack, he was going to leaving him some space to demonstrate his quirk before quickly killing him.

"Hehehe, you idiot!" The villain screamed madly before trying to do a sneak attack using his quirk. Oki was surprised to find the man's right toenail bursting from his shoe by elongation and did some weird shit before trying to pierce his neck.

Oki was utterly disgusted and traumatized by this horrible sight so he used his kagune to break his long toenail in half and pierce his neck with it without touching it himself.

"Glurghhhh" The man suffocated on his own blood before falling lifelessly to the floor. "Should I eat him? I'm not going to get sick am I?" Oki sighed before cutting the man's stomach open with his kagune, effectively avoiding blood from touching his precious hand-made costume, his mask was that of a fox by the way.

Oki had gotten more professional regarding the theme of eating his villainous victims. He now had a container that he carried with him in order to pluck out his victim's organs and eat them.

Oki totally disregarded the idea of hiding his bodies years ago, he now uses gloves to collect organs for later foods and his kagune to avoid too much blood to contact him.

He has now successfully become a serial killer in the eyes of many people, this of course includes heroes as well who have become annoying because they kept appearing to stop him. Oki's hunting spots always vary every time he kills someone, he sometimes has to travel two hours on foot to kill someone because of heroes patrolling the area.

Oki was now about to leave after collecting his victim's organs but the world didn't want him to do so as a hero appeared in front of him. This had happened many times before but they never caught him because of his fast speed and reflexes.

"You vile villain, your heinous acts stops now as you've come across my way, beware of the shining incredible hero, Sunny Mask!!…" Sunny mask said whilst posing dramatically, this was being accompanied by a bright light that seemed to radiate from behind him.

The fox masked man named Oki looked at the Sun masked individual with incredible discomfort and embarrassment. "Are you okay?" Oki asked with concern.

Sunny Mask looked offended by his comment and said, "I'm good, but you won't be after receiving my sunny punch!" Sunny Mask rushed at Oki with what seemed to be a punch made from light, it looked incredibly powerful and dangerous.

Oki dodged the punch without any effort, and tripped Sunny Mask to the floor with his right foot. "Gagh" Sunny Mask screamed in pain as he hit the floor head first before not moving anymore.

"Dude, are you okay?" Oki asked before crouching down to look at his injured enemy. As Oki was about to check if the hero was alive, Sunny Mask stood up with incredible speed and aimed his dangerous looking light punch at Oki's head. "Farewell you villain, he said.

Oki saw the punch in slow motion about to make contact with his head before he dodged and hit Sunny Mask's face with a little too much power with one of his kagune. Sunny's head flew off of his body to the wall of cement next to Oki before his body fell down with a loud "Thud!"

Instead of how a normal person would react to killing a hero, Oki was filled with anger. "Fuuuuck!!" Oki screamed as he strongly kicked the hero's body in anger. The body was immediately splattered against the wall of cement along with the already smashed head.

Oki tried to calm down his anger but that only made it worse, even though he was considered a serial killer, he had only killed villains up to this point along with defeating some of them to train his proficiency in martial arts before turning them in to the police.

Some people regarded Oki as a hero, but now he had killed one in cold blood… 'Wait a second, no one saw me, that means that there might still be a chance to not fuck up' Oki thought.

Oki had the desire to be a hero at some point in the past, but it vanished along with some of his mental health because of eating and killing too much.

Oki didn't want to admit it but he was becoming addicted to human meat because it tasted so good, and that took a toll on his mind. The more he ate, the stronger he became but it came at a cost… his humanity.

Oki now limited his food to when he's a day away from being hungry, in the past it was a week before being hungry. This all changed when he noticed sadistic tendencies along with irracional and erratic behaviour developing in him.

Oki regained his senses and looked at the splattered wall with determination. He had a backpack which had containers of food and cleaning devices in case something like this ever happened.

He took his devices and cleaned the wall and floor in less than 15 minutes, the body and brain matter was put on a box in his backpack. Oki thanked the heavens that he practiced a lot with his first victims before this moment.

Whilst Oki ran away from the scene, he failed to notice someone looking at him from the corner with a wicked smile. "Who would've thought that 'the human ripper' would kill a hero" a man with blue hair and sickly appearance said mockingly as he watched Oki leave.

"Master will be glad to hear this" The man said before leaving the scene.