She appeared ordinary at first glance, but had a kind and caring personality, and we had been dating long enough to start considering marriage. One day, we made plans to go on a hot spring trip together with her best friend Yuna and Yuna's boyfriend. When I first met Yuna, I was instantly drawn to her—she was exactly my ideal type. But the moment I learned she was already engaged to her boyfriend, my heart ached. That night, in the mixed-gender hot spring, I touched Yuna's beautiful body and lost all sense of reason. Now, I've entered a relationship I can never go back from...