Kun was starting to feel uneasy around Jaemin. He had heard so much about Yura's childhood friend that he couldn't help but feel a bit threatened by him. Jaemin was the perfect boy in every way, and he made sure to remind Kun of that every chance he got. He would tease Kun and say things like, "Don't worry, Kun. Yura and I know everything about each other. You're just the new guy."

One day, when Kun was confiding in Min about his insecurities, Min told him that he should be worried about Jaemin for a different reason. Apparently, Jaemin was sent abroad during high school, just before he and Yura started dating. Min hinted that there was some unfinished business between Jaemin and Yura, and that Kun should be careful.

Kun didn't know what to do with this information. He had never heard Yura mention anything about Jaemin being abroad during high school, but he couldn't help but feel suspicious. Was there something going on between them that he didn't know about?

As the days went on, Kun found himself becoming more and more distant from Yura. He couldn't help but think about Jaemin and what might have happened between him and Yura while he was away. Yura noticed that something was off, but Kun couldn't bring himself to tell her what was bothering him.

One day, while they were studying together, Yura finally confronted him. "What's going on, Kun? You've been acting weird lately."

Kun hesitated for a moment before finally blurting out, "I