Are there any fantasy romance that is slow burn

To be or not to be
Mo dao zu shi
You own my all

They are historical, but have supernatural/fantasy element... and they are shouldn’t at...hope is alright....

These are straight romances and more historical than fantasy, but super slow burn
http://www.mangago.me/read-manga/emperor_and_the_female_knight/
http://www.mangago.me/read-manga/lady_to_queen/