ok then I'm going to say greek mythology but I'm also going to say a little bit of a twist-the gods sort of exist outside of time, so the underworld is very much like a sprawling NY city type thing and Mt. Olympus is a lot like L.A. And then I'm going to give you TWO romance myth options cuz Imma level-there's...not a lot of good love stories in ancient greek mythology that don't end in tradgedy. So you get Hades x Persephone or Psyche x Eros.
Which raises the question-
do you want to be an acts tough outwardly but secretly they're actually like the biggest fucking sweetheart and a total charmer-so like terrifying businessman who secretly loves the heck out of his dog and just kinda really wants a family-
ORRRR-
Hardcore flirt/playboy with mommy issues(Wait...REN IS THAT YOU!?)