Itou Ayako is a third year in high school and the president of the public morals committee. Part of her job is to ensure that the amount of sexual relationships between students doesn't get out of hand. As president, she is expected to set a good example and be a role model for the other students. But what if even she wants to get a boyfriend...? Recently she's become a little bit interested in fellow committee member Kawai Harumori. And so begins a struggle between duty and love.

Note: Aventure = French word for "Adventure" or "Love Affair" in English.