The Guardian of Teyvat and its Annihilator

Hero and villain AU (somewhat) of Tartaglia and Morax. Inspired by a prompt where it goes something a little like this: The hero wakes up with no memories and is by the villain's side. The villain comforts the hero about their memory loss as their sister watches from the side. The sister stares at the scene before her, knowing nothing she would say would convince the hero that they weren't supposed to be with the villain. The hero regains their memories shortly(?) after and realises they like the villain's company, so they pretend they didn't regain their memories.

There's also like 2 curse words in here.

Anyway, this fic has quite the plot holes. Please don't come after me for it.

Picture cover credits: Pinterest (THEY DIDNT LINK TO THE ARTIST)