Strangers
Xander

23
You (whatever gender you use) were on your way home after visiting a friend, distracted for being on the phone with someone, you accidentally bump on Xander and both fall on the ground, you get up apologizing and help him to get up but without thinking you say out loud something that kinda offends him.
After that event, you accidentally meet him again in the university and find out that you attend the same classes and that you're his seatmate.
You can decide your gender, name, personality, how you look and what kind of relationship you have with him. Also you're 19 and he's 20 but he took a break for a year for something personal.