Durarara!!, Vol. 2 - manga

If you see Shizuo Heiwajima, don't wait around. Run!!
Mikado is an average high-schooler whose life has been anything but since moving to Ikebukuro! After coming face to-neck?-with the legendary "Headless Rider," Mikado can hardly wait to encounter more of the city's peculiar residents. But when Mikado is caught in the middle of a feud between Izaya Orihara and Shizuo Heiwajima, he soon realizes that Ikebukuro's most unbelievable characters are also among its most dangerous...