Shoya Chiba

Koudo Ikusei Senior High School is a leading prestigious school with state-of-the-art facilities where nearly 100% of students go on to university or find employment. The students there have the freedom to wear any hairstyle and bring any personal effects they desire. Koudo Ikusei is a paradise-like school, but the truth is that only the most superior of students receive favorable treatment. Ayanokouji Kiyotaka is a student of D-class, which is where the school dumps its inferior students in order to ridicule them. For a certain reason, Kiyotaka was careless on his entrance examination, and was put in D-class. After meeting Horikita Suzune and Kushida Kikyou, two other students in his class, Kiyotaka’s situation begins to change.

A samurai lord has bartered away his newborn son's organs to forty-eight demons in exchange for dominance on the battlefield. Yet, the abandoned infant survives thanks to a medicine man who equips him with primitive prosthetics—lethal ones with which the wronged son will use to hunt down the multitude of demons to reclaim his body one piece at a time, before confronting his father. On his journeys the young hero encounters an orphan who claims to be the greatest thief in Japan.

Haruka Sakura wants nothing to do with weaklings—he's only interested in the strongest of the strong. He's just started at Furin High School, a school of degenerates known only for their brawling strength—strength they use to protect their town from anyone who wishes it ill. But Haruka's not interested in being a hero or being part of any sort of team—he just wants to fight his way to the top!