Saki inherited her parents' home and lived happily ever after with no children, modestly supporting her office worker husband. One summer day, while she was doing housework, a stranger suddenly barged in and robbed her. Although she is terrified, Saki realizes that the man is her husband's younger brother, Kyosuke. Debt from black money, fired from company... Desperate brother-in-law forcibly rapes Saki. And then I just stayed at home... The scumbag brother-in-law who ran away to his parents' house is a sexual monster! She continues to violate her brother's wife without worrying about her husband finding out!