Hikari is a beautiful private tutor with a great figure. She tells young boys that when they build up, their worldly desires and evil thoughts prevent them from concentrating on their studies, so she gives them a blowjob or a titjob with her huge breasts every time they have a lesson, but she doesn't allow them to have sex because it's teacher and student. One day, her father finds her giving him a titjob and scolds her, but the teacher seduces her father...