During a long holiday, Rin visits her parents' home with her husband to spend time with her sister and brother-in-law. They planned to relax as a couple, but her husband has to leave early for urgent work, leaving Rin alone at her parents' house. While Rin relaxes in the comfort of her childhood home with her close sister, her brother-in-law, Joe, can't stop staring at her. Her voluptuous breasts and plump ass are right there in front of him. One evening, seeing Rin come out of the bathroom without a bra, Joe can no longer suppress his desire and pins her down...