The protagonist is a boy with a cute face like a girl. He is a student at St. Trea Academy and serves as the secretary of the student council. One day, he confesses his feelings to the student council president, Hinasawa Tomoka, whom he has long admired. Tomoka is admired by all the students, regardless of gender, because she is serious, excels in both academics and sports, and is beautiful. However, she has a troublesome fetish. She wonders if he would be willing to become her "boyfriend and plaything." As the protagonist is subjected to Tomoka's naughty pranks, he feels embarrassed and resists, but eventually awakens to the pleasure.