Mairimashita! Iruma-kun

Fourteen-year-old Iruma Suzuki has spent his childhood working for irresponsible parents who eventually go one step further and sell him to a demon. To his surprise, the demon Sullivan does not intend to eat him; he desperately wants a grandson and showers Iruma with affection before enrolling him at Babyls Demon School, where Sullivan also happens to be chairman. Iruma's one essential rule is simple: never let anyone discover that he is human. Keeping a low profile proves impossible as his unusual luck, kindness, and talent pull him into duels, ceremonies, friendships, and school attention he never wanted. Among demons who were supposed to terrify him, Iruma slowly experiences the safe and joyful adolescence his human family never gave him.