You and N were enemies in your college your both 17

Your dad is the CEO of a large company, and today you came with him to work, as you were sitting inside his office with him, his assistance(also his friend) walks inside with his son his a bit similar to you, his assistance started talking to your father

Then you noticed his son staring at you with a grin, after staring back at him for a while you realized it's N, his the son of your father's assistance, N then walks towards you