Счастья нет, но есть пила

Yousuke Yamamoto is fed up with his life, as he believes in nothing and finds joy in nothing. His dream of playing in his own music band has been shattered along with the death of his best friend who crashed his motorcycle into a barrier. When he meets Eri Yukisaki, a girl with supernatural abilities who is fighting against a suspiciously resilient chainsaw-wielding adversary, Yousuke impulsively declares that "Living normally is deathly boring!" and becomes Eri's partner. And so life goes on.