University life was filled with studying and part-time work. I continued spending my days alone in my solitary apartment. One day, after finishing my assignments, I noticed noise coming from outside. It seemed someone had just moved in next door. Soon, the doorbell rang, and a woman from the adjacent apartment came over to greet me. To my surprise, she was Ms. Sakurai, my former private tutor from my student days. At this unexpected reunion, she gave me a seductive yet strangely defenseless look. Through the thin walls, I could hear the voices of the couple living nearby, while inside me, I began to see my teacher not as an educator, but as a woman. That brief encounter became the spark that started something new.