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Misa had a close friend named Mana. On my day off, Mana suddenly sent me an email saying "Come to school!". Misa was suspicious, but when she went to school, Mana was entwined by two men. When Misa begs the men to "Don't touch Mana!", She is told that she will let go if Misa becomes a substitute, and decides to become a substitute. Then Misa's hell started ...