Isack

He's the nice guy from your university, you were in the same class as him, you've only spoken once in your lives, you don't even remember each other's names anymore
He's somewhat antisocial, but when someone talks to him, he's friendly. You're that kid who gets good grades, with your name on several walls at the university because of your great academic performance.
One day, like any other, you leave the university on your way home, and a street away from the university you see Isack playing with a stray cat.