Kotone Nishida grew up without her mother, but had a father who treated her like a close friend, and their bond was deep and affectionate. When Kotone traveled to Tokyo for an open campus event and stayed at a hotel, she requested a loaned air purifier at the front desk. Strangely, the hotel employee assigned to assist her turned out to be a former subordinate of her father. This man had once suffered severe power harassment from Kotone's father, ultimately forcing him to resign from his job. Upon reuniting with Kotone after all these years, old wounds resurface and his suppressed rage reignites. Seeing her massive breasts, he becomes consumed with vengeance and sets his sights on using her body to exact revenge.