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About : A high school student who dreamed of having a girlfriend after graduating from school, but instead ended up in the demon world of Matou, where he met Kyouku Uzen. He became her slave and acquired the ability to turn into a demon in order to henceforth support his mistress in battle. As a reward, Kyoka grants him wishes, usually of an erotic nature. As a child, he lost his older sister in Mato under mysterious circumstances, so he decided to join the Seventh Special Forces to take revenge on the ...