I'm curious why every monster seems to know that MC almost tried to kill himself along with his daughter, or at least believe he did try? This implies they all learned of him the moment he arrived,
learned of the daughter as she arrived and don't know much about the father outside of the daughter's purview (which might explain why they don't know how the father knows about them),
OR the mother was watching and is controlling the monsters (which would explain the eyes that stared at him when he initially arrived in this world), though the mother is a pretty loathsome character if that is the case, as she seemingly lacks any compassion to the father who struggled so much for the daughter.
I also wonder if the father is still ill. The daughter was miraculously cured, but that doesn't necessarily mean the same for the father, and he might have a hard time limit for how long he can organise his daughters safety and life without him.
Curious where this is leading, but it's definitely a series that's started strong so far.