Because Shinya's scores are always very low, if things continue this way, he won't be able to get into the university that his family hopes for. Therefore, his father invited a famous tutor to teach him extra classes. That tutor is Nene, a very youthful and beautiful girl. While studying, she always reveals her alluring underwear, making it impossible for Shinya to concentrate. To help him focus, Nene will soothe his erect penis, and if he scores high on the upcoming test, she will go out with him. Not only Shinya but also his brother and father are attracted to Nene; they cannot resist her continuous seduction with her underwear...