There is a girl who is a student at a tailoring school. She has a friend who has a boyfriend and is always having sex. She herself, however, remains a virgin. She sees her brother masturbating one day. She asks her friend to have sex with her brother. Her friend asks her to spread it for her older brother in exchange. It is a deal and the four go on a hike从前有只西瓜,他老是迷路,于是去买了个指南针。终于成功地找到路的时候,他变成了一只南瓜。。