The stuff is passable.
Nothing special tho, it still feels like another generic isekai. The only different is mc was na old man.
What i dont like here is the characters, they're evil because they evil, they're good because they're good, black and white. I dont even know what gray position in his house, why other workers despise their own owner in front of gray. It seems like he is also part of the owner.
Trusting strangers you met 5 minutes ago seems like a problem in any other isekai, especially when mc supposed to be and old man, he's just like another teen in other Japanese isekai tbh.