DLDSS-145 Having an affair with your lover's best friend before getting married

One day, I went on a hot spring trip with a pair of my best friends, and her best friend Yuka, whom I met for the first time, fell in love with my ideal type at first sight. Firstly. However, when she learned that Yuka was engaged to her boyfriend, she was heartbroken. That night, when Yuka went to the hot spring alone, I couldn't think of anything, and even though I knew it was useless, I still followed her.