This is new anime, the story goes of boy falsely accused of murdering his own classmates, while the truth, he's innocent, so he was thrown in a different type of prison, where he lives with possibility of dying any moment, and he set his goal to survive to proof his innocence even though all proofs says he did it.
I'm impressed there is new anime worth watching, Rating 18+, contains violence and bloodshed, very gruesome not recommend for children.
