With eight months until his entrance exams, an adult student knows he should study, but he cannot stop fantasizing about glamour model Rui Shido. His father hires a private tutor to get him back on track, only for Rui herself to arrive at the door. Her revealing outfit and breasts make concentration impossible, and he finally pushes her down. She offers him an intimate incentive to focus, turning their tutoring sessions into lessons in both exam preparation and sex.