Ayase Miki is a notorious gyaru at school, famous for her wild behavior and constantly teetering on the edge of having to repeat the year. Her homeroom teacher, Sakurai Makoto, has tried everything to reason with her and get her to change her ways, but nothing seems to work.

Believing that the situation is hopeless without involving the parents, he decides to make a home visit to speak with Miki's family directly.

When he arrives, the door is opened by Miki's mother, Minami - a breathtakingly attractive woman with an incredibly curvaceous figure. Neither mother nor daughter seems to take the teacher's visit seriously at all. In fact, right in front of him, they immediately start bickering and playfully competing with each other, bragging about who has the sexier, more attractive body.