Even though the economy is in a difficult time, her husband still has a stable job with a very good salary, so they don't have to worry about food and clothing. Today, while doing housework, a masked man suddenly broke into the house and forced Saki to open the safe. If he were an ordinary thief, he wouldn't know that Saki's family had a safe, but by his voice, Saki could tell that this was her brother-in-law Kyosuke. It turned out that because of large debts and embezzlement of company money, Kyosuke was fired and had nowhere to live. In desperation, he came up with the idea of robbing his brother! But when he saw Saki's sexy body, he not only wanted to rob her money, but also this sexy daughter-in-law! And since then, Kyosuke has lived in the storage room on the second floor. Saki brings him food and water every day. When she wants, Saki must be ready to strip, to satisfy her sexual needs! However, the pleasure of making love to Kyosuke that Saki's husband could not bring her. She gradually sank into the quagmire of lust, until one day, her husband unexpectedly returned home earlier than usual.