Mitsuki, a girl who is cute enough to be proud of wherever she goes and popular with male students, has been in love with a teacher at her school for a while, and one day, unable to suppress her feelings, she barges into the teacher's house. In fact, the teacher is a pervert so much that his wife ran away from him, and he is a man with a strong libido who became a teacher for the impure motive of wanting to have sex with young girls. The girl who has fallen in love with such a devilish man is played with as he pleases in order to be liked by the teacher...