Durarara!! Side Stories?!

THE GOOD, THE BAD, AND THE DOWNRIGHT WEIRD. The Ikebukuro district in Tokyo is full of interesting people. A boy longing for the extraordinary. A hotheaded punk. An airheaded pseudo-stalker. An information broker who works for kicks. An underground doctor who specializes in truly desperate patients. A high school student infatuated with a monster. And a headless rider on a pitch-black motorcycle. Their story may not be a heartwarming one, but as it turns out, even weirdos like these sometimes fall in love. (Source: Yen Press)

This is a four-part Durarara!! series made for Niconico and the 10th anniversary of Durarara!! and 20th anniversary of Dengeki Bunko. They take place after Vol. 13's events. There are spoilers for the end of the novels. This series also serves as a prequel to Durarara!!SH.