Although he's the most "talented" student in his grade, Jinguuji is absent from school. To encourage this son of a yakuza to attend lessons, Yuuki, the assistant teacher in charge, pays him a visit at home. However, when Jinguuji is joined by a girl and Yuuki catches his attention, he becomes aroused and forces Yuuki to have sex with him. Is there a hidden "family secret" that Yuuki isn't allowed to know, as he is consumed by the ferocious gaze of Jinguuji?