My sister-in-law is forcing me to come... It all started when Emi, Ryota's sister-in-law, came over to the house, worried about Ryota, who was feeling lonely while his wife was back at her hometown. After finishing her housework, Emi sends Ryota to the bathroom, and he comes in naked to wash his back. Emi washes every inch of Ryota's body, ignoring his confusion. He gets an erection when she sees the big breasts that are presented to him. Emi, pleased with Ryota's reaction, whispers, "I want you to wash my body too," breathing heavily.