ngl I'm starting to think the harem wasn't even planned at all by the mangaka. Might've been forced onto them cause hurr durr harem manga sales go up kinda thing.
Haru's the kid in the other horny af for the husband mom series, he's referring to the latest valentines chapter in which she made a choco statue of herself to give to the father.
I have a feeling if that were to happen, all the women in that cult may become pregnant.
Also might be a new religion in this world perhaps. Souism kek.