Durarara: Orihara Izaya's Secret

Izaya Orihara, who considers himself God of Ikebukuro, says he loves humans. But what people didn't know was that Izaya had one certain human that he couldn't get enough of! Later on, 8 months after the meeting of a gang called the "Dollars", coming back from her study abroad in America, Sena Q. Ashigawa! She returns...

Durarara: Shizaya What's Happening?

Izaya Orihara wanders around Ikebukuro like always, and, like always, Shizuo Heiwajima comes along; and they fight or play their little cat-and-mouse-chasing game, BUT! Something weird happens and they both need to help each other in order to return to Ikebukuro.