Tsukumo works hard at a part-time job at a convenience store in order to earn money for her favorite band and dates with her boyfriend. However, the part-time manager is a perverted man from the Showa era who enjoys being alone and messing around with Tsukumo. One day, when she went to a store for a part-time job, she saw the store manager jerking off his cock in the backyard... She was shocked to see something she didn't want to see, but even more so, she was shaken by the fact that the store manager's cock was so big. Affected by the store manager's poisonous fangs, she becomes cock-crazy... Even though her boyfriend is nearby, she gives a blowjob to the store manager's big dick. The more she inserts her shift, the greedier the pussy of a female part-time worker in uniform becomes... If she doesn't replenish her drinks and replenish her balls with sperm, her sperm inventory won't catch up with age-difference mating.