Ai has been troubled lately by her live-in brother-in-law, Shunichi's, deteriorating behavior. When they first started living together as college students, he was a good kid, but he eventually stopped going to school and his room became a mess. To top it off, Ai was fed up with Shunichi's constant loud noises. When Ai finally reached her limit and gave Shunichi a stern talking-to... Shunichi, feeling resentful about being scolded, took revenge the next day by forcing her to take his cock in her mouth. From that day on, Ai's life as Shunichi's disgusting, oral sex slave began...