Konno Ao is a beautiful high school girl known as “The Prince”. Touyama Kouyou, a boy who used to tease her relentlessly back in elementary school, kept confessing his love to her. “I dislike boys; I like girls.” That was the reason Ao gave when she rejected him. But after that, the person who appears before her is… “Momiji”, Kouyou transformed into an exceedingly cute girl. Carrying past guilt and current love, Momiji declares, “I’ll prove I can be the best girlfriend to you.”. Even though it shouldn't, for some reason, Ao's heart begins to race. The curtain opens on a springtime-of-youth romcom full of mistakes.