Ikebukuro has a slashing problem.

Ikebukuro, Tokyo. A place where the clumsy and inept at love gather. A high school girl worried about her status. A third-rate magazine reporter covering the Ikebukuro beat. A teacher suspected of sexual harassment. A thug wearing a yellow bandanna, who is said to be the toughest around. A young man who deals in all manner of sensitive information. And a headless rider on a coal-black motorcycle. As these individuals and more are drawn into a whirl of unlucky incidents, Ikebukuro itself will begin to crumble...!