More like this

same but so far I haven't found any stories like this

There's this one I read before: The Youngest Princess http://www.mangago.zone/read-manga/the_youngest_princess/

The two psycho brothers entertain me a lot

Well I have read twin siblings and it’s pretty much the same except they weren’t slaves but instead were just held captive by their mom

Ah I like this one yes the yandere ish psycho bros are indeed entertaining but I forgot about the series and accidentally dropped lmao

do you know more like this ?

Monster duchess contract Princess
Who made me princess
Emperor's daughter
I'm the child of this house

I’ve dropped most of these lol

why?

Well other than monster duchess the others kinda got real slow so I wanted to wait until a lot of updates came in