Find old manga

It’s a rather obscure one I think but I’m trying to track down a manga I read a couple of years ago about twin girls who have to pretend to be the same person as they live with they step mother and her sons? It’s like a subverted Cinderella tale and has a really gothic art style to it. I can’t remember the names of characters well but I remember that the the oldest step brother had a thing for her and the youngest was an artist who loved to paint her and the middle son teased her a lot? Also the step mother disliked the girl and killed one of the twins (not knowing they were twins) and super spooked when the remaining twin showed up the next day alive as they alternated in interacting with the family and assumed the same identity

I know it’s rather long but it’s driving me insane trying to look for it as I really wanna reread it