Satsukare

When Yuuta Kiryuu accidentally kills his girlfriend during a beating, he runs away from the scene and winds up reluctantly falling in with a group of repulsive criminals. From abusers like himself to serial murderers, rapists, cannibals, and more, his twisted world only gets stranger the deeper he goes.

(Source: Shinchosha, translated)

Notes:
- Volume 2 contains a side story
- Volume 3 contains a side story
- In volume 4, chapter 38 is split into two parts
- Volume 5 contains an extra
- Volume 6 contains an extra