JUY-721 On a winter's day when the north wind blows, I feel the warmth of the kotatsu and my aunt as I write down my pen. - Yuko Shiraki

This winter, when it started snowing, I dropped out of university and was studying for the qualification exam at the house of my friend's mother, Sanae (Yuko Shiraki). - My crotch was on the verge of exploding as I was alone in the kotatsu with my idol Sanae. - That day, I was too fixated on Sanae's thighs peeking out from the kotatsu to study for my qualifications. - Sanae-san noticed me and started teasingly playing with my crotch with her toes. - Moreover, Sanae's pranks won't end there...