This story is about Haine Otomiya, a 15-year-old high school girl student at the elite private Imperial Academy (帝国学園 Teikoku Gakuen). Apparently sold to foster parents for fifty million yen, and a one-time gang member, Haine reformed when she met Shizumasa Tōgū, who told her to live life how she wanted to. She fell in love with Shizumasa and entered the Imperial Academy to try and win his love.

Now, Shizumasa is the Koutei (皇帝, Kōtei, lit. emperor) of the school. Being the president of the student council and the only member of the gold class, he is the one who everyone looks up to. Through various circumstances Haine is tricked by Maora, a student council members, into becoming his bodyguard and joining the student council. However, Shizumasa claims not to know her and is unexpectedly cold towards her.