[Reducing Mosaic]JUY-721 On a winter day with the north wind blowing, I started writing while feeling the warmth of my aunt and the kotatsu. Shiraki Yuko

This winter, as the snow began to fall, I had dropped out of university and was studying for a qualification exam at the home of my friend's mother, Sanae (Yuko Shiraki). Being alone with my crush, Sanae, in a kotatsu made my crotch ready to explode. That day too, I couldn't focus on studying because of Sanae's thighs peeking out from the kotatsu. Noticing me, Sanae started teasing my crotch with her toes. And her mischief didn't stop there...