Since my wife went back to her parents' house for childbirth, Daidai had been living a lazy life. Then, suddenly, my wife's sister, Chiharu, came to help with the housework. Daidai, who was fed up with the messy room, welcomes Chiharu, but... Every time she cleans, I can't help but make a sound in my throat at the sight of her panty shot and her alluring thighs. My last bit of reason disappears as the defenseless Chiharu, smiling with a lovely smile, comes closer and closer to me...