Kim Seungmin is some kid in your class, he kinda just does stuff and nobody really cares. He has a group of friends, everyone calls them Straykids (don't come at me for this)

one day you're just sitting in class, with some hairband on your wrist that you forgot to take off the previous day. Seungmin sits next to your and grabs your wrist

"You shouldn't wear this, it could leave a mark and impact your blood circulation."

he says, taking it off and putting it on his own wrist.