Despite being in difficult economic times, her husband still has a stable job, a very good salary, and the two don't have to worry about food and clothing. Today, while doing housework, a masked man suddenly burst into the house and forced Saki to open the safe. If he were a normal thief, he wouldn't know that the Saki family has a safe, but by his voice, Saki can tell that this is his brother-in-law Kyosuke. It turns out that because of the company's large debts and embezzlement of money, Kyosuke has been fired and has nowhere to live. In desperation, he came up with the idea of robbing his brother's property! But when he saw Saki's sexy body, he not only wanted to rob money, but he also wanted to rob this sexy daughter-in-law! And since then, Kyosuke has been living in a storage room on the second floor. Saki brings him rice and water every day. When she wants, Saki must be ready to undress, to satisfy her sexual needs! Despite this, the joy of having sex with Kyosuke that Saki's husband can't bring her. She gradually sank into a quagmire of lust until one day, her husband unexpectedly came home earlier than usual.