Forced to work overtime during the Obon holiday, the department chief endlessly complains about his job. As he sits there dazed and exhausted, he suddenly recalls Horiguchi Hotaru, his subordinate with soft, round buttocks. In that instant, the chief decides, "I'll call Hotaru in and playfully tease her wobbling ass." He immediately phones her, and the moment she arrives at the office and bends over looking for documents, he fixates on her round ass from behind. Pushed to his limit during the work break, the chief begins sexually harassing her while fixating on her back. Amid the quiet office atmosphere, an intense excitement begins to build.