Deadman wonderland. story & art by Jinsei Kataoka, Kazuma Kondou ; translation/Joe Yamazaki ; English adaptation/Stan! Vol. 1

Ganta, a teenager, watches as his class is massacred by the "Red Man," a monstrous anomaly. The blame is pinned on Ganta and he is sent to a bizarre amusement park-like prison known as Deadman Wonderland. Ganta must survive the prison and clear his name.