Growing up a target of bullying, senior high student Hajime "Ichi" Shiroishi is a skilled karateka, but goes completely weak in the knees with fear when it comes to fighting.

Among all this, a power junkie and classmate of Ichi who does nothing but fighting, Dai Akakuma, sets his eyes on Ichi!!

When Ichi starts to shed tears, all of a sudden a violent impulse that resided inside him is unleashed!!!!

(Source: Shogakukan, translated)