For a good deal of this, I thought maybe stalker dude might have a legit beef with Ploy, like maybe she stole something when she left or some such. She is into weird schemes after all. But this last chapter or so, he's been going beyond that to the point where I can't see it being possible to write it off.
As to Ploy herself, she seems to kinda waver between being resentful and shipping them. If she'd let go of all that baggage, she'd be fine.