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…