the female student council president's secret is masturbating while engrossed in sm manga at school. the sensitive girl's sexual curiosity escalates. before she knows it, she longs to be trained herself. one day, while masturbating in the toilet, she is caught in the act by the janitor. after thinking about it, she tells him that she is actually interested in sm, and he invites her to come play at his house... female student council president sm individual guidance! crotch rope quickie torture two-hole simultaneous torture! a model student is implanted with a masochistic fetish!