Muzan's Demon Queen (Pokemon x Demon Slayer)

SOOO... this is my Ash Ketchum AU x Muzan from Demon Slayer/KNY. Don't ask why. I just had an idea and went with it!

So. Background for this story is necessary, so here it is!!:
Ash was born in the Demon Slayer world as a demon-god-creature-thing - he is basically a hybrid -, and, around the time he was twenty, he met Muzan, and they fell in love. They both knew that they were different, as, despite having tried many times to have kids, they could not due to their... unique circumstances. Both of them are demons, so, naturally, they can't reproduce the way that normal humans can. During the time that Ash and Muzan were together (they still are, don't get me wrong, just separated from each other due to Ash's Blood Demon Art, called 'World Shift', not working in his new world of pokemon... well, currently, at least), they decided to try adopting, but they weren't exactly considered to be qualified parents as they didn't have a home that was stable enough for a kid. Eventually, they ended up turning other humans into demons after discovering that they could do so as long as they both injected their blood into a human. Before Ash activated his blood demon art, he gave a few drops of his blood to Muzan just in case, hence why Muzan is able to become female, and create demons on his own. After Ash activated his blood demon art, and didn't return even after a year, the demon race basically made themselves known as they began to literally tear through Japan looking for their mother and queen. so yeah. hence the events currently happening in the anime & manga. Welp, on with the story, I guess!!