I went on a hot spring trip with my best friend on a double date, but actually, I ended up being intimate with my best friend's boyfriend. He's not really my type, but physically, we were a perfect match. Honestly, I've always been envious of my best friend being so in love and satisfied. Even though I knew it was wrong, the thrill of being intimate with my best friend's boyfriend secretly was incredibly exciting and I couldn't stop. Hey, this is a secret, right?