A voluptuous, plump schoolgirl gets exposed for attending an enjo kosai party and is forced to perform a blowjob as punishment by the student council vice president. Upon discovering the situation, her admired student council president joins in, and the three of them enjoy a naughty time together. When the school principal finds out, she is further disciplined with a gonzo-style punishment: being filmed in her sailor uniform and bloomers while receiving piston-like thrusting instruction. The appeal lies in the fusion of a student's innocent, pure body with a touch of eroticism.