historical drama with slave/high status romance

hiii so i’m looking for a period drama (any country) about a romance where the female lead is a slave/servant/maid and the male lead is a person of high status such as crown prince. something like 

princess agents 

general and i 

legend of fu yao

thank u in advance!! 

Moon embraces the sun

Love in the moonlight (Moonlight drawn by clouds)

Legend of Lu Zhen

Prince of Lan Ling

Jang Ok Jung

Dong Yi

Bu Bu Jing Xin/Startling by Each Step/Scarlet Heart