 The main protagonist is an average boy named Leo Tsushima who is secretly in love with the eldest daughter of the Kiriya Corporation and who is the student council president - Erika Kiriya.Later, a senior female student, Otome Kurogane, knocks out several of the main characters one day when they are trying to sneak into school after being late.Surprisingly, it turns out that she is Leo's beloved cousin that he had not seen for years.