Inheriting the family home of her parents and living alone together without children, Saki was happily supporting her salaryman husband modestly. One summer day, while doing housework, an unknown man suddenly breaks in as a robber. Despite being terrified, Saki realizes the man is her husband's younger brother, Kyosuke. In debt from loan sharks, fired from his company... his desperate brother-in-law forces Saki to... and then stays in the house... The worthless brother-in-law who fled to the family home is a sexual monster! Ignoring the risk of being discovered by his brother, he continues to violate his sister-in-law!
