This winter, when the snow started to fall, I dropped out of college and was studying for a qualification exam at my friend's mother, Sanae (Yuko Shiraki)'s house. Being alone with my crush, Sanae, in the kotatsu, made my crotch explode. That day, I was so fascinated by Sanae's thighs peeking out from under the kotatsu that I couldn't concentrate on studying for my qualification. Sanae noticed me and teased me by playing with my crotch with her toes. But Sanae's pranks didn't end there...