Changbin is ur childhood best friend that u haven't seen for a few years before u transferred and got into the same as him. You two get along well even if he became a bit of a player but he's sweet with u. Hyunjin is very popular but not a player. He has some unsolved issues with Changbin

One day you were sitting in the cafeteria, waiting for Changbin as Hyunjin approached you, sitting down next to you

"You you're the one that arrived a few weeks ago that gets along so well with Changbin?"