Rika, a wife, is devoted to treating her husband's erectile dysfunction. It's been a while since they last had sex, and Rika's overflowing sexual desire is no longer under control. One day, her husband comes to her for advice about her and her younger brother. He says that if he sees his wife being sexually assaulted by his younger brother, he might get an erection... Rika is confused, but she decides to fulfill her husband's strong request. Unable to resist the cock she hasn't felt in a long time, she is overwhelmed and reaches a climax!