On a night when there is a major power outage, I'm alone with my admired sister-in-law...

This spring, when my wife and I were planning to enjoy dinner with my sister-in-law, Chika, who is the announcer. I was always captivated by Tomoka, who was beautiful, calm and mature, sexy. The moment they tried to toast with their wife and Chika, they were hit by a massive power outage. My wife was called to the hospital where I worked, and I was alone with Chika until morning. There's no way Chika-san, who doesn't leave my side when she's afraid of darkness, could control her rationality...