After being accepted to university, I decided to start living alone. When I finished sorting everything out, my mother, who was a sobriety, told me that it was important to have a relationship with my neighbors, and I was forcibly taken to the next house. When I opened the door, greeted the woman who lived next door, and looked up, it was Mr. Morisawa, my tutor when I was a student. The teacher I met again after a long time was bewitchingly beautiful, and I was excited. And on the night of the move, I heard the voice of the couple's activities from the other side of the thin wall.