Seungmin is your bestfriend's boyfriend. They were pretty close and you never thought they'd break up one day, until they broke up all of the sudden and there's no reason to their break up apparently.

One day at school you were studying quietly in the library and you as you were studying a group of boys were being pretty loud

"Excuse me can y'all be quite for a second? I'm trying to study..."

You said as one of the boys turned to you and said,

"Oh we're sorry."

For a second it sounded like Seungmin..? You looked up seeing it's actually your bestfriend's ex.