During sex training at the university, the girls tease each other about how hard it is to get a woman to have sex with them. When they finally get to the point where the girl is having sex with a man, she is so wet that she starts to suck the man's dick out of her mouth. The girls try to comfort her by saying that they'll make her feel better, but she won't be able to do so if she doesn't get used to it. She's just getting wet, they say, because she's already had sex with the man. They continue to tease the girl, and she gets even more upset when she realizes that the man has already started sex with her. She starts to scream, and the girl's husband, saki, comes out of nowhere to try to calm her down. He tells her that her pussy is "twitching" , and that he's been trying to get her to give in to his advances. He says that saki has already given in to him, and they're about to start sex again when saki gets up to leave. .