Wanted AU: Losing Your Memory 

vixlunaortus:

Muses A and B are in a long-term, committed relationship and are deeply in love. But,one night, during a very bad storm, Muse A gets into a ver bad car accident and loses their memory — including everything about Muse B. Now, Muse B has to find a way to help Muse A remember the love they shared by trying to jog their memory with familiar instances, like reenacting their first date, etc.

Alternate Version: Muse B fails to restore Muse A’s memory. Muse A meets Muse C and they hit it off, making Muse B desperate to make Muse A fall in love with them all over again before it’s too late.