Changbin, your friend with benefits. You don't want to date, so you choose to have a more casual relationship: FWB.

You two agree to go on dates a few times, but in front of your friends, you act normal. His friends, known as 'Stray Kids' are always suspicious of you, but you always deny it. He's a bit jealous when you talk with some handsome guy, but he try to act tough and don't addmit it.