Yukana Asakino is a part-time music teacher. She has both beauty and saint-like kindness. She's the perfect woman, respected by students and teachers alike... however... She has a secret that no one knows. The only one impervious to her charm is Koki Nagami, one of her students. He's standoffish and always treats Miss Asakino coldly. However, he also has a secret he's been keeping from everybody...!