Love the twist, the mangaka is actually pushing this entire idea of 'who is real who is not' quite aggressively. There is an early arc in Monogatari that relies on this same 'gimmick' but works to an absolutely amazing effect.
Also, the fact FMC seriously just played the wingman for a literal ghost is some godsend stuff. She's such an original character - self-confident, mature and doesn't get heart-struck easily, as is the case with most FMCs in these stories.
I'm really enjoying this manga thus far, it has a lot of potential. Thank you for the translation and hope you don' drop it!!!