At a hospital in Tokyo's Third Ward, a man undergoing a routine checkup meets Koume, a new nurse with an extraordinary K-cup bust. Dressed in her nurse uniform, her chest strains against the fabric, bulging to the point of bursting, presenting an irresistibly erotic sight that leaves the man spellbound. When she asks, "Is there any area you're concerned about?", he half-jokingly replies, "My penis!"—to which Koume enthusiastically plays along, diving headfirst into a steamy encounter. Her massive, firm, and highly responsive breasts sway with every movement as she repeatedly climaxes with lewd, orgasmic expressions, embodying pure eroticism. Overcome with desire, the man remains fully erect throughout, and Koume willingly accepts creampie after creampie with eager compliance. ※Recommended viewing positions: seated on chair → lying on back → seated on chair → lying on back