In reality, Kanae never had an abortion. I imagine that because he was raped by his own brother, traumas plus weakness, made him think he never had a child. Yuki takes care of that child. The rest is bizarre and hard to digest, as it gets darker and darker. I will leave you the link of this page where you can upload the summaries of each chapter of this story.
https://m.facebook.com/story.php?story_fbid=1139906069761916&id=580842055668323
I tried making sense of it but from what I can glean is that this might've been meant to be a sequel series of it's own. It's hard to tell tho seeing as facebook has royally fucked its layout to hell and back and I haven't used it in over a year and have no idea wtf is going on or how to navigate lol

I feel unsettling