On the Verge of Lunacy

When a strange man in red armor slaughtered Igarashi Ganta's entire class and embeds a red crystal in his chest, his life changed forever. Days later he was sentenced to death and sent to a prison camp that  also functions as a theme park. In Deadman Wonderland, inmates are asked to perform various tasks that sometimes result to death. Each prisoner has a collar which constantly injects poison in the bloodstream. There is an antidote however in the form of a candy which must be consumed every three days. It acts as a currency in the prison and is acquired by performing the tasks given to them such as contests and performances. Ganta believes he can still find the "Red Man" and avenge the death of his friends. However, he must first figure out how to survive the lethal games in Deadman Wonderland. With the help of his new friend Shiro, Ganta might just discover something more to the strange events he's been thrown into since the massacre of his classmates. M...