I'm not good-looking, but I was dating a girl with a great personality and started thinking about marriage... One day, we went on a hot spring trip with her best friend couple. Her best friend Yuna, whom I met for the first time, was my ideal type, and I fell in love at first sight. However, I found out that Yuna was engaged to her boyfriend, and I ended up heartbroken. That night, I saw Yuna's beautiful body in the mixed bath hot spring. Even though I knew it was wrong, I ended up forcing a relationship with her...
