Responses
right so now I've finished reading whatever's out of the novel
Spoilers below
Nain doesn't choose between Amon and Gwen and he's still a partner to Amon and a lover to Gwen. Gwen and Amon hate each other but know that they can't get rid of each other because that would ruin Nain's fragile mental stability and so they pretend the other doesn't exist during situations where they're forced together.

this is probably the first time i’ve rooted for the 2nd ml (idk if he actually is)