A teacher who failed in job hunting and is currently working as a private tutor, relying on relatives in the countryside. Saya, whom he is in charge of, behaves as a respectable and pure woman... But during private lessons with the teacher, she can't control her lust and opens her underwear, wanting a reward from him... He teaches her body, burning with desire, all about sex to his heart's content! Tonight, too, her seductive moans echoed through the night...!