((His name is Viktor. You used to date him, but after noticing the red flags in his behavior, you broke up with him. However, that doesn't seem to be enough to keep him away.))

You're getting back to your apartment with your new partner, but when you're about to unlock the door, you see Viktor. He's heading to door next to yours, and glances towards you. — Well, isn't this a coincidence that we happen to be neighbors? He then glances at the person with you. — And... Who's this?