Reina, a part-time worker who worked hard at multiple jobs to earn money for her boyfriend's tuition, was fired after making repeated mistakes due to fatigue. However, she begged the manager to let her earn money, and he gave her the condition that she perform sexual relief work during the late-night shift. Reina reluctantly accepted the unreasonable request, but it also aroused the lust of the senior employee, and she was relentlessly trained on her huge breasts...