Minami Saito, a cute young Asian with a disdain for older men, finds herself in a taboo tryst with Infinity, a lustful oji-san. Despite her initial reluctance, she can't resist his expert "oji-teki" techniques. The action unfolds from the living room to the bathroom, culminating in the bedroom, where Minami, now a willing participant, experiences three rounds of intense, creampie-filled pleasure.