"No words are needed for my physical relationship with my sister." One day, my parents remarried... and my step-sister, Aoi, came to our house. Suddenly, I was living with a cute sister who wasn't even related to me by blood. I couldn't help but be conscious of sex. One day, while my parents were out, I was alone with Aoi... I was even more conscious of her than usual, and when I looked over, I noticed that she was also conscious of Aoi... and the two of us had sex without a word, just by the atmosphere. From there, my physical relationship with my sister began, where "when our eyes met, we would silently do it like monkeys." Also pay attention to "Aoi Kururugi with short hair" showing off a different kind of cuteness than usual.