Guardian

"Bye, cockblocker."
"What's that supposed to mean?"
Harry is anything but a cock block.
"Oh, nothing...you were in my way so I called you a cock block in my head while walking away. Obviously we both had two different impressions of each other at that time." At that Louis struts away.
"For your info, I called you mean but cute guy after that!"
Harry sounds so stupid, he is this close to smashing his head into his door right then and there. And to add to it, Louis simply leaves him in the dust like the loser he is, the elevator dinging as the doors shut.
____Or ____

Based on a color guard (see below) experience, where Harry and Louis are both professional guard members and they meet, hating each other, naturally being rivals. But they both get more of a thrill off the performance adrenaline then they probably should.

{ Colorguard is an auxiliary sport most often seen performing with a marching band in the fall, along with drill teams. They spin equipment, ( not to be confused with twirlers, although some schools do combine the two) including 6-foot flags with 3-foot silks, wooden rifles..or guns... (they are fake, chill out) and sabers..or swords if you must. This spinning is also combined with dancing. Colorguard has recently gained a lot of attention in the 2000s and is currently gaining more international attention each year.}
- Cursing, sexual content.-