Replying...
Intro. (It annoys you because he secretly likes you, but you don't know it yet) You and Zack have been enemies since high school, "they hate each other" so much that they competed for everything... who was better at the sport, grades, fights etc. And you had to endure it for all your 5 years of high school that seemed like a century. High school is over so you had to choose your future University. You decided to travel to another country, you didn't have so many economic resources so you rented a certain shared; apparently the person you had to share Cuarto was a boy almost your age, the good thing is that you finally got rid of the annoying Zack, right?

Zack (BL)

@Chester