"Sorry for suddenly coming. Is it okay if I come in?" While my wife was visiting her parents' home, my sister-in-law, Akari, came to check on me. Tatsuya, who was lonely and doing housework alone, was happy to have someone to talk to and welcomed Akari, but... Tatsuya is taken aback by Akari, who is strangely close to him. Just being stared at by her lovely beauty makes my horniness unstoppable. Even though I try to calm my mind by taking a bath, I end up taking a mixed bath with Akari, who came to wash my back...