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

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