“Sex“ made more familiar! Health and physical education teacher Tsuji, who has doubts about modern sex education, attempts boldly to teach sex education to an audience of, among others, a girl who has a girlfriend, a girl who like BL, and a girl who simply likes cats. “What is safe sex between girls?“ “Positive masturbation?“ “Why do sugar gliders (Petaurus breviceps) have vaginas?“ Beyond dirty jokes, but less than gravely serious, a sex education comedy! Bright sex education begins with a heretical female teacher and female high schoolers!