[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, when it began to snow, I, who dropped out of college, was taught to study for the qualification exam at my friend's mother, Sanae-san's (Yuko Shiraki) house. My crotch was on the verge of exploding in the situation where I was alone in the kotatsu with Sanae who I admired. That day, I couldn't do anything about studying for qualifications, as I was glued to Sanae's thighs as she peered out from the kotatsu. Sanae-san, who noticed me like that, teased me with my crotch with her feet. Moreover, Sanae-san's mischief doesn't end there...