You're at a meet and greet
(Though the scenario says "cheer," I have it as AnyPOV bc guys do cheer too.)

You're meeting your Co-Stars for "The Maze Runner: The Death Cure" and you bump into him

He's your substitute teacher
(This was inspired by me, the one and only. In math bc the lesson was boring AF. ;) Yw.)

You two got trapped in an escap-less room together

You were walking home from a friend's house and stumbled upon an injured Rusty-James.