Author: Narita Ryohgo
Illustrations: Yasuda Suzuhito
Notes: This is the final part of Nicococo!!, a four-part Durarara!! series made for Niconico and the 10th anniversary of Durarara!! and 20th anniversary of Dengeki Bunko. There are spoilers for the end of the novels. This series also serves as a prequel to Durarara!!SH.