Bottom Set against passive player

I'd guess at him having over cards on the flop. Then either Kx or AA to keep betting after K shows up. Then with the bet on the river either AK or AA. Or maybe king with a weak kicker that made 2 pair.

I wouldn't fold. But others might have a better answer

I think you can´t just call 2 streets. You have to raise him either OTF or OTT and try to go all in imo.

I think turn is the place to make a raise.

I like it as played. We could raise OTT but the board is quite dry and a good villain will fold anything else than better sets against a turn raise.

I like this hand, you beat aa ak nh

I am raising flop quite small versus passive guy. He isn't going to c-bet more with air anyway, and a flop raise seems weaker than a turn raise. He'll call or raise with a big pair. The goal is to get it in by the river, in small chunks.