After failing an entrance exam to her school of dreams, Hiyoko Osora gets an acceptance letter from SM academy without even applying.She arrives at the school and gets a huge shock...All the students are monsters!!. The head of the student council namely Kouro introduces her to the entire school and claims her as his fiance..then sprouts black wings. Hiyo learns that he's a crow, and she's the legendary white crow too. Follow Hiyo to discover her past promises, her true self and the pain and dangers of losing everyone she cares about. Let's find out how they can surpass all the obstacles for the sake of their love!!!