This has a completed novel. she is a pretty lady who's trying to survive on her own since she's an illegitimate child not acknowledged by her father when her mother died. the ML starts as a disgusting jerk and eventually fallen in love with her and stopped his promiscuous life after they got together.
i was reading this in webnovel before and dropped it when the ML has a weird "fetish" of having someone watch him have s*x every night with different women. unfortunately, Julietta was able to endure and seems uninterested with ML so she is hired.
i just scanned some parts but never finished it. ¯_(ツ)_/¯
and yes, in order to appear ugly, she darken her skin based from what she learned from those who took care of her, wore thick glasses, add freckles and add more clothes as weights so she'll appear fatter. this is to not make her appealing to men since noblemen are very powerful and they wouldn't like to repeat history with julietta (mother's fate). as far as i can remember, her mother is a prostitute who died from an illness. she's an illegitimate child who smeared the name of her father who's part of the nobility