No monogamy. I was advertised a harem, and so help me god, that's what I want to see. I want the gratification of seeing the lead girl get with every dude and all of them getting along afterwards under that state of affairs because she's just that much of a catch. Everybody who wants to do monogamous marriage larping should pick a different series or save it for bible study.
(And no, imo it's not hypocritical for the MC to criticize the heroine for going after multiple men because that was definitely more of her criticizing the fact that she was lying to them and playing with their hearts/being insincere rather than just... enjoying multiple hookups. Not that the MC can't also have her own misgivings about polyamory that she needs to get over. But still, that's not where I see the critique coming from.)