Four adult male students are hopelessly in love with Tomoka, the 40-year-old married part-timer from their workplace. Seeing her bare F-cup breasts in the mixed bath makes them so hard that one masturbates and ejaculates on the spot, and her accepting reaction sends their desire out of control. A sincere confession leads to outdoor sex, she gently teaches an adult virgin how to enter her pussy, and after heavy drinking the trip ends in a five-person orgy with eleven ejaculations in total.