Durarara!! Re;dollars Arc Vol. 6 (manga)

As a founding member of the Dollars color gang, Mikado Ryuugamine methodically purges those unharmonious from its ranks. Kida attempts to rein in his friend's madness and begs Kadota's group of core Dollars members to leave, but they refuse. However, when calamity befalls Kadota, the spark of a new disaster catches flame...Meanwhile, in the hospital, Shinra tells Celty of his middle school days with Izaya Orihara...!