First-year class president, Otogi Katsura, assumes the role of a pristine and gracious girl with pride. Ever since she was a child, she knew what people expected of a beauty such as herself, and she upholds this virtuous image without fail. The only person to rival Katsura, both in appearance and charm, is her vice president, Toki Ninomae. On top of that, his impeccable manners make him the perfect match for her as the school's madonna—in her opinion at least.

Though it appears impossible to prove, Katsura is confident that Ninomae wears a mask just like she does. Her suspicions are soon confirmed when she accidentally exposes her sharp-tongued side, and, encouraged by her boldness, Ninomae follows suit to reveal his brusque and cool nature. From then on, Katsura and Ninomae start to shed their false angel disguises and lower their guard around one another, without realizing how easy it is to fall in love.