Durarara!! dj - Black Hole.

Welcome to Ikebukuro, where Tokyo's wildest characters gather!! Meet an ordinary boy who daydreams about the extraordinary. A naive stalker girl. The strongest man in Ikebukuro. A shut-in doctor with questionable credentials. A hedonistic informant...and the "headless rider" astride a pitch-black motorcycle!? As their paths cross, this eccentric cast weaves a twisted, cracked love story... (Source: Yen Press)

Pairing: Shizuo x Izaya In the series: V.1 - Silent Beast: Being enemies who have sex, doubting theirs feeling, hating, not being the same with others, wanting to stop, but still... V.2 - Encounter with the Hero: Evading, realizing many terrific things, missing, Izaya with meteor shine memories, childhood memories when he learned that to love is to lose. Shizuo connecting, hating, remembering and deciding. V.3 - Two Player: Hating, searching, accepting but wanting to destroy it, Shinra's opinions that make them run and confront.