Thank you so much for playing Moriko!
You are totally right: the old man first appeared in my old game (demo,a actually) "Discarded Doll Story", although he didn't really have a body, he was just lying in bed. Since Discared Doll Story was...discarded..., well, I recycled the old man sprite and turned him into the hero of this game.
You definitely missed some dialogs, but that also happened to other players. Perhaps I should have made those routes more evident (there was only a message saying that each tenant has special dialog options if you visit them again, but romance wasn't mentioned at all).
But yeah
As always, thank you for playing and for your feedback!