"When you get an erection, you'll do as I say." Mochida, a junior high school student, has become close friends with Aoyama, the most beautiful girl in his class. However, while he is thinking of her and hiding in the library to masturbate, he is seen by Taira, a library committee member. He is in a desperate situation, but for some reason Taira demands a kiss from Mochida. Without even knowing why, Mochida has his lips stolen and is led to ejaculation, and is then invited to join a secret club activity, the "Kiss Club." This is the story of the breakdown of youth as 14-year-olds become addicted to the taste of taboo.