Because the company cut personnel, I am currently unemployed, thanks to unemployment insurance, I can hold on for a while longer. Suddenly, a beautiful girl moved into the room on the opposite side. From my room I could see the whole side through the window. It seems that she herself did not know that she was being peeked at, carelessly having sex with someone else at the window so that I could admire her perfect whole body. After a while of watching, I found out that it seemed that the man was not the husband of the beautiful girl, he always arrived at 15 o'clock, and the day he came was decreasing. Today was the day he still came to fuck her. But after waiting for no one to appear, she suddenly found me and called me over. Her name was Suzume Mino, and she knew I was spying on her. Thinking that Mino-san would get angry, I knelt down and begged for forgiveness. But contrary to my thoughts, she wasn't angry at all, but she also wanted me... Let's practice riding posture with her! The thing was that Mino-san was the other man's mistress, and he always criticized her poor sexual skills, especially horseback riding. Mino-san thought that for that reason, he gradually got tired of her and came here less and less. She wants to improve her sexuality and help men feel even happier. And from then on, I became a tool for her to practice. I was only allowed to lie still and she rode on me. But over time, she seemed to be more accepting of me, no longer doing everything by herself but giving me the initiative, enjoying sexual pleasure together...