The plot was about a boy who is the king of hell and lives with a girl who is angel reincarnation with suppressed memories. She has red wings or something (very different from the rest of angels she lived with) and doesn't remember the boy who is living in the same house as her, he knows who she is. Later she wakes up from her past memories. Forgot the name of manga.

Sounds kinda like Kurenai Ouji Though, it's the guy who has the red wings.