I think the manga was about a reincarnated person that is taken in by a noblewoman. He is visited by a demon girl a few times. She is able to sneak into the mansion/castle and she eventually invites the MC to dinner.
He ends up going and it turns out to be a bbq with other demons in the forest. The demons are all “family” and has been taken in by the girl demon who was actually a high ranking and powerful demon. I think one of the demons was also a reincarnated person from the past.
I started it a few months ago but lost track of it and cannot remember the name. Couldn’t remember much more than the bbq chapter. Anyone have any idea which one this is?