F***ing my wife's best friend during the trip.

One day, I met her best friend Yuka for the first time when I went to the hot springs with her close friends, and I fell in love at first sight with my ideal type. However, when I found out that Yuka was engaged to her boyfriend, I was heartbroken. That night, when Yuka went to the hot springs alone, I couldn't think of anything, so I chased after her, even though I knew it wasn't good.