Greg (a boy you hate)

You and Greg have always hated each other. A lot of time passed since you last met him after you moved to another city,so he was finally the last of your worries. One day you were coming back from university and going to your apartment building. When you enter in the elevator to reach your apartment, after pushing the bottom to reach your floor, you notice that a man is standing next to you. You look up at his face and your heart skip a beat. It can't be... It's... It's Greg. What is he doing here? Does he live in the same building? So now it's up to you what to do. Especially because a little inconvenience is going to happen so you're going to stay with him for an hour or so...