Inaka ni wa Kore Kurai Shika Goraku ga Nai OVA

A struggling young man working at a village office takes a side gig tutoring Fujino Saya, the village’s model honor student — only to discover she harbors an overwhelmingly strong, long-suppressed sex drive. Saya initiates a sexual relationship with him, framing it as a “reward” for her academic efforts, and the two fall into a routine of having sex after every tutoring session, with the line between education and lust completely blurred. Saya becomes increasingly dependent on her tutor, confessing she thinks about his cock even during class and begging for raw, unprotected creampie sex. Despite the risk of being discovered and ruined in the small rural community, they continue their arrangement — all while Saya achieves top academic results, which the villagers attribute entirely to her tutor’s excellent teaching skills.