On the outskirts of Tokyo lived a young man named Koda Yamada. His life was an unremarkable blur of school, homework, chores, and daydreams about becoming a hero like the ones in his favorite anime. But fate had different plans for him.
One evening, as Koda walked home, a black van screeched to a halt beside him. Before he could react, strong hands grabbed him, and everything went dark.
When he awoke what felt like hours later, Koda found himself in a dimly lit laboratory, the air thick with the scent of antiseptic and metal. Strapped to a cold metal chair, he faced an old man in a white lab coat
"Welcome, Koda," the man said, his voice dripping with malice. "I am Dr. Kuroshi. And you, my boy, are the key to unlocking the human soul's darkest potential."
Before Koda could protest, Dr. Kuroshi injected him with a strange, glowing serum. Pain surged through Koda's body, and he felt a burning darkness spreading within him.
Days turned into weeks as Koda was forced to commit heinous acts under the influence of the serum. Every night, he stole from the innocent, sabotaged the small, remote city's infrastructure, and even hurt people he didn’t know. Each sin weighed heavily on his soul, but he couldn't resist the serum's control.
Koda then discovered that he wasn't alone in the laboratory. Other children, victims like him, were also part of Dr. Kuroshi's twisted experiment. Among them was a girl named Kyoni, whose eyes shone with defiance.
"We have to fight back," Kyoni whispered one night when they were both in their cells. "We can't let him turn us into monsters." Together, they hatched a plan to escape and stop Dr. Kuroshi. It was risky, but it was their only chance.
The night of their escape, the laboratory was plunged into chaos. Koda and Kyoni, using the skills they had unwillingly honed, overpowered the guards and made their way to the heart of the lab. There, they found the source of the serum—a pulsating, floating red crystal.
"We destroy this, and we end Dr. Kuroshi's control," Kyoni said.
Just as Koda picked up a chair and was about to throw it and destroy the crystal, guards came up behind him, took the chair and pinned his arms behind his back.
"You think you can stop me?” Dr. Kuroshi laughed. “You're mere children!"
Koda realized then that Kyoni had run out of the room. In the days that followed, he heard from other captive children that Kyoni had escaped the laboratory. He could only hope that she would find out where they were, in the light of day, and bring authorities here to take down Dr. Kuroshi and his evil laboratory.
Koda felt the syringe enter his arm, as he began another nighttime shift of sin.
