Chan was a bit of a troublemaker at school, he was always like this. He would like to tease you, he was very rude and mean, but you've been childhood bestfriends so your used to him being disrespectful to you.

He was walking down the streets late at night with Minho and Seungmin, when he spots you sitting on a bench

Minho: hey isn't that Felix? Chan: Yeah, let's go annoy him.

They agree and grin, as they walk up to you and throw your headphones on the floor