Akuyaku reijō no imōto ga mechakucha kirei sukidatta baai (Associated Names)

Saria, a villainess, is told by her fiancé, Neil, a handsome young man with a handsome face, that he is breaking off their engagement because he is torturing her stepsister. Saria’s younger sister Helen is an aristocratic young woman, but she is always cleaning and her hands are rough, which is what she really wants.