Yuuwaku kyoushi maruhi kyonyuu ressun

Original title: 誘惑教師（秘）巨乳レッスン

Directed by Yoshikazu Katō

High school teacher Ayumi is told by the principal that she'll be laid off if she doesn't improve her students' grades. So Ayumi bets her boobs on Shunpei, the lowest-performing student, and begins secretly tutoring him...