Shards of a Broken Glass Slipper

Roena, the stepsister beloved by everyone. Sise, the new older sister who hated her. "Roena. I really hate you." After losing everything, Sise ends her life before Roena's eyes, leaving those words behind. That's definitely how it was... "My name is Roena. Does this mean we are family now?" Her life was repeating. So bitterly and hopelessly. (Source: Kakao Entertainment, translated)