I’m not a big fan of Celine/Rumi because in all honesty I find it really gross
BUT I do think it could be enjoyable if done right
There’s a sapphic manhwa called Kill Me Now and essentially it’s about a woman who kills a child’s father when she’s about 10/11 years old in an act of revenge, takes the kid (for whatever reason) and tells the girls that she can and should try to kill the woman
I feel like the entire concept of that manhwa would be very fitting in the context of KPDH.
Demon Dad ruins Celine’s life somehow, Miyeong being long dead before any of the events happen (post-birth), and Celine has enough and kills him
She finds Rumi hiding in the closet after she does what needs to be done
Fast-forward 10 years, what should be murderous intent is now an obsessive-sexual thing and now Rumi wants Celine in every way because that’s the best way to torture an emotionally repressed, suicidal woman
I also recommend Kill Me Now if you can handle the topics in it (rape, human trafficking, torture (of the evil people mostly), a few more that I can’t think of off the top of my head). It is an absolute masterpiece in my opinion, other than the smut being sort of male-gazey but the creator is straight and she did try her best
I'm not going to yuck your yum but this is just not why I write crack ships like Rumiline. For me the fun is in making it not problematic (ie no grooming). I see it as a challenge. For example my Doctor!Celine x Polytrix idea doesn't have Polytrix show up until after all of them are adults and there is no power dynamic. The story stops being about the taboo and starts being about the characters. In the Doctor!Celine x Polytrix the main character is Celine and whole character arc is about her rejecting tradition and learning be and love herself.