High school teacher Ayumi is told by the principal that she'll be laid off if she doesn't improve her students' grades. So Ayumi bets her boobs on Shunpei, the lowest-performing student, and begins secretly tutoring him...

Mai, a bank employee, was fed up with her monotonous daily routine. Every morning, she was subjected to a lecture bordering on sexual harassment from her branch manager. To make matters worse, she was constantly being nagged by Yumi, a senior colleague who was having an affair with the branch manager. Meanwhile, Hamasaki, who harbored feelings for Mai, visited her at the counter almost every day. However, Mai had started dating Takashi, a handsome esthetician at the beauty salon she frequented after work. Then, Mai began receiving prank calls…

Yuji, an erotic novelist, hires a housekeeper while his son and daughter-in-law, who live with him, are away on a trip. Upon seeing Mai, the housekeeper with enormous breasts, Yuji immediately begins teasing her using his novels as material...