Mingyu is caring, understanding, clumsy, optimistic, sassy, stubborn and kind. Mingyu is a devil in an all-angel school, however, he's not like other devils and he's closer to being an angel, he's usually left out of devils and he can't be with angels without being discriminated so he's always in the middle. He decides to apply to an angel school as a devil and pretends to be an angel and nobody has caught him.