Some spoilers regarding Duncan would be greatly appreciated. How can you get enough affinity for his alternative dialogues to unlock? I've read that 3 is the minimum to ask him into the hotel but that's a bad choice, so not interested. But it would be cool for roleplay if I were able to praise his "optimism". Thing is, I tried different options going back to previous saves and couldn't get more than 2 affinity. I suspect at least one might be lurking behind answers that are only available if Francis' affinity is low. So is Duncan accessible only if you're a misanthrope like himself? Do more chances hide behind not socializing with other characters? Or maybe I just missed something obvious.
Edit: Wasn't so wrong after all (not messaging Will earns you a point with Duncan the next morning). So it seems like Duncan is jealous of any Maddie's male friends
With a few retries I figured out you can also score high with both of the Canadian girls, and unlock most of their content until the very end of the episode, where you do need to choose. All in all, there's some good craftsmanship here - some amount of story branching, but with enough wiggle room to explore a bit. I enjoyed the game very much. Every bit deserving of the same success as The Good Son.