Kadono Haruki, a skilled artist, is made to enter contests at a young age. Pressured because of his talent, he is troubled about what to draw. One day he takes a walk outside at night with his painting tools and enters a forest. There he finds a beautiful young girl. It's so unexpected that he thinks she's a fairy, is immediately captivated and asks whether he can draw her. After showing her the picture, the girl says that when they get older, she will make him his bridegroom. Being a child, he agrees.

Flashforward to the present. After entering high school Haruki has never met the girl. And all his paintings since then have all fallen short of that masterpiece. One day, a girl shows up at school and immediately kisses him, asking him to make good on his promise. Unfortunately, it happens in front of all his female childhood friends. Rushed by the sudden bold action of this newcomer, the childhood friends take action in order not to lose Haruki. Things will change from this point on...