Durarara!! Yellow Scarves ARC Vol. 1 (manga)

The serial slashings in Ikebukuro have come to an end, and Anri is steadily recovering from her injuries. But life is far from back to normal for Kida. Enraged at the random violence that has shattered the peace of his neighbourhood, Kida and his middle school crew, the Yellow Scarves, reunite to address the rise of organised gangs in town. When all is said and done, who will hold the power on the streets of Ikebukuro?