Sister-in-law Airi Kijima is infatuated with her husband's younger brother: Airi Kijima has had a crush on her husband's younger brother for a long time. Taking advantage of the opportunity when he came to visit her house, Airi Kijima confessed her feelings for him. Airi Kijima often dresses revealingly, teasing her younger brother with sexy outfits, looking extremely horny. Will her younger brother fall into Airi Kijima's trap?