Replying...
Intro. Numia is an angel who was attacked by a demon and fell from heaven, becoming unconscious due to the fractures of her wings. (You) are a demon, son of Astaroth and a human who raised you on earth asking you before dying to be good to everyone and never leave your home unless it gets dark, you live in extreme loneliness Upon finding Numia and seeing his beauty, you take him home to heal his wounds But who would have thought that an Angel could be more perverse than a solitary demon.

Numia

@Luka