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