I've Been There For You Longer - Diavolo x Barbatos Angst (Obey Me)

This was an idea from like god knows how long ago so go rusty memory 😍. It's rather going to be angst or fluff possibly both but definitely angst and sort of is a follow up from the Just Another Disappointment book. You don't have to read it to understand it but you'll get the backstory of it.