The parents, who were having a hard time dealing with the brothers Shinsuke and Akira, who were not good at studying, decided to hire Madoka, a rumored talented private tutor. However, the brothers, who were not good at studying at all, are still virgins and have never been with a woman, so they are distracted by Madoka's mature and voluptuous body and are unable to concentrate on their studies. However, Madoka is no match for such adversity, and solves the brothers' problems with secret lessons, teaching them both academics and sexual techniques.