This is the very opposite of My Wife Is From A Thousand Year ago.
While the idea is phenomenal, the story writing, especially the characters, are piss bad. The characters simply don't act in a believable way at all, and the progress of their romance feels extremely fake and more like the author's delusion.
If's a big sad for me to write this, too, because the idea of your fictional waifu becoming real, is, honestly, very cool, the execution is just terrible.