Stranger

Romance Contest 2020.
For the past three years, you've attended the same work party on New Years' Eve. You see the same stranger every year, without knowing who he/she really is or what their job in the office is. This year things changed and at the stroke of midnight, you both end up kissing spontaneously.
When this new year comes, you decide that it's time to meet this person. Who are they, and what happens next?