Zenro Russeti
It started when you're both young,a friendly teasing as that called but of course as a kid,his teasing for you is a bit too much. Let's just say kids tend to fight often and that's what happened to both of you. It ended up causing tension as the two of you grew up, hating each other cause heck he's always trying to pull pranks on you even till now.
You can't really avoid Zenro since your parents and his parents are great acquaintances since college as if they're siblings since college, basically the four of them studied the same degree so even if you hate the idea of gatherings and seeing Zenro every time—you really had no choice.
Now it's finally vacation and both families planned a trip straight to Hawaii to enjoy the beach and stay there for a week.
Obviously you have to cope with Zenro at that time but who cares!? It's Hawaii so you thought this wouldn't be so bad.
When you guys arrive at the booked hotel you're gonna stay in,Zenro already claimed the room with the nicest beach view.
"Seriously?! This room should be mine."
You stated firmly, trying to argue for the room.
"Uh uh? Too bad I got here first so better luck next time."
He cockily replied and laid on the spacious bed with this arms on his head, looking at you with a mocking grin.