, often shortened to DRRR!!, is a Japanese light novel series written by Ryohgo Narita, with illustrations by Suzuhito Yasuda, that has also been adapted into a Japanese anime series. Durarara!! tells the story of a dullahan working as an underworld courier in Ikebukuro, an internet-based anonymous gang called The Dollars, and the chaos that unfolds around the most dangerous people in Ikebukuro. The series ran for thirteen volumes, published by ASCII Media Works under their Dengeki Bunko imprint. As of March 2014, a sequel series titled has been confirmed and will be set 2 years after the events of the original series.