<A girl in a uniform who works hard at a convenience store for her boyfriend sells her body for a slight increase in hourly wage...> Kasumi has no money and works part-time at night, even though she shouldn't. The store manager takes advantage of her weakness and proposes a secret part-time job as a sexual service. The vile manager, who has his eye on J-cup breasts, takes this opportunity to demand a sexual service. The sexual service job that started with a titty fuck escalates into sex and creampies, and Kasumi's Kokoro and body are being eroded day by day...