The website is looking for couples to participate in a project. The rule is "If you can make him cum five times within 60 minutes, you will win 1 million yen." However, only the girlfriend is allowed to move. With the girlfriend's technique that knows her boyfriend's weak spots, which couple will have the most ejaculations? With raw insertion, she straddles him, swings her hips, and sucks out all of his semen with her uterus!