Deadman Wonderland

Ganta Igarashi is the sole survivor when a mysterious man in red massacres his classroom. Framed for the killings and sentenced to death, Ganta is imprisoned in Deadman Wonderland, a facility where convicts are forced into brutal public deathmatches. His situation grows stranger after he befriends Shiro and discovers that he can wield his own spilled blood as a weapon. The ability may be connected to the man responsible for the classroom attack, giving Ganta a possible path toward understanding why he was targeted. To uncover the truth and seek justice, however, he first has to survive a prison designed to turn suffering into entertainment.