Deadman Wonderland

Ganta Igarashi was headed to Deadman Wonderland, a prison amusement park where convicts perform stunts, with his classmates for a field trip. However, their trip turned disastrous when Ganta's classmates were brutally killed by a man in red clothing, and he was wrongly accused of the crime. Sentenced to death, Ganta is shipped off to the very prison he was supposed to visit, where inmates with extraordinary abilities reside, and a deadly collar around his neck forces him to participate in the prison's brutal games to stay alive.