Five years into a stable but dull marriage, Fumika takes a convenience-store job three days a week in search of excitement. Unlike her infertile husband, the younger adult college student working beside her treats her tenderly as a woman, and she falls for him. They have intense sex and creampies again and again inside the store, in the stockroom, the office, and at his home. Her voluptuous body proves irresistible, driving the pair through 20 wild rounds.