This winter, as the snow began to fall, I had dropped out of college and was staying at the home of my friend's mother, Hayasaka Sanae (Shiraki Yuko), while she tutored me for a certification exam. As our time together grew more intimate, my feelings for her steadily intensified. The moments we spent alone under the kotatsu became increasingly erotic, stirring arousal deep within my groin. I couldn't focus on studying—my eyes were drawn to Sanae's thighs, my mind consumed by desire. Noticing my distracted state, Sanae teasingly began to rub my crotch with her feet, playfully provoking me. But what started as a joke slowly escalated into something far more intense...