Miyu is a somewhat airheaded girl who's short on credits. To avoid repeating the year, she starts licking her homeroom teacher Arisa's legs. As she carefully and thoroughly laps at her teacher's beautiful legs with her tongue, she gets increasingly aroused, removes her bra, exposes her breasts, and begins masturbating her nipples. Arisa, overwhelmed by pleasure just from having her legs licked, eventually climaxes. Forced to concede, she agrees to grant Miyu the credits she needs—a compelling storyline centered around leg fetish and lesbian desire.