Kaoru wants Kyoshiro's girlfriend, Tsumugi, for himself. He meets Kyoshiro in a chat room and they make a contract. Kyoshiro and Kaoru will take turns training Tsumugi to be a sex slave, and they'll record their progress on a website. At the deadline, all the site's visitors will vote on which one of them deserves to be Tsumugi's boyfriend.

Kaoru想要Kyoshiro的女朋友Tsumugi为自己服务。他在聊天室遇到了京四郎，他们签订了合同。京四郎和薰将轮流训练 Tsumugi 成为奴隶，他们将在网站上记录他们的进度。在截止日期之前，该网站的所有访问者将投票决定其中哪一个应该成为Tsumugi的男朋友。‎