In 20XX, the Love Education Law was enacted. "Love" has become a mandatory subject in a response to the declining birthrate. Michitaka Sato, a high school student who has given up on romance and works hard on his studies, is on the verge of failing school. When he attends a supplementary class to avoid repeating a grade, Mai Aihara, a beautiful girl who is a problem child, appears as his partner...? Suddenly, he begins to study love alone with the beautiful girl in the three C's. Close contact, close quarters, and behind closed doors! Does Aihara-san have a secret...?