If you're looking for a true slow-burn story—where the relationship develops naturally and the romance takes its time—I'd definitely recommend
" Full Moon Alchemist."
If you're in the mood for a vampire romance instead, then "The Homeless Vampire " is a great pick.
These are the first two that came to mind, but if they aren't your style, let me know. I have plenty more recommendations depending on what kind of story you're looking for.

Bl like a lovely meal