Mio found herself on a trip with her beloved son, the first time they had traveled together since their relationship began. Excited at the prospect of being able to make love freely without restraint, they arrived at their accommodation and immediately headed to the hot spring, where they reaffirmed their passion in the private family bath. However, a man was secretly watching them. He recorded their intimate moments without their knowledge and later showed the photos to Yumi, threatening to expose them. Shocked by the images, Yumi became distressed and was forced into giving the man a blowjob under duress. That evening, despite enjoying a delicious meal and making love with her son, she couldn't shake the fear caused by the man's threats and was unable to fully relax. The next day, she was summoned by the man and forced to masturbate in front of his subordinates, eventually being gang-raped by the two men. Overwhelmed by relentless pleasure, Yumi reached climax repeatedly, her body filled with thick, white fluids again and again.