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There's this school where all the students are criminals. It's a secret institution where they teach unlawful kids who've committed serious crimes.
Yuuki Oku was mysteriously taken there and as punishment for his crimes, his memories has been taken away along with six other boys who also had parts of their body taken away from them.
However, they have a chance to get back what was theirs and graduate from that school if they can find the puppet student who took their body parts.