Ichika, who was working desperately at multiple part-time jobs to earn money for her beloved boyfriend's tuition, was told she would be fired after repeatedly making work mistakes due to fatigue. However, when she pleads with the store manager to make some extra money, she is given the condition that she performs sex work during the late-night shift. Ichika accepts the unreasonable request with tears in her eyes, but it also fuels the vice manager's lust, and she is relentlessly trained into her voluptuous body...