Yeonjun wasn't the type to be insecure about anything, really.
or
When Yeonjun realizes that his fat crush on Choi Soobin is starting to /really/ trouble him as the younger throws himself onto the blonde every time he possibly can.
yeonjun always sees the same guy on his way to uni.
or how choi yeonjun tries to approach the cute tall guy he sees every morning without embarrassing himself.