This winter, when 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-san (Yuko Shiraki). In the situation where it was just the two of us in the kotatsu, I was on the verge of exploding with desire for my idol, Sanae-san. On that day too, I was glued to Sanae-san's thighs peeking out from under the kotatsu, and I couldn't concentrate on studying for the qualification exam at all. Realizing this, Sanae-san teased me by playing with my crotch with her toes. Moreover, Sanae-san's mischief was not going to end with just that...