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[There was a pitiful girl who cried tears of diamond and lived while being abused by her family. But...
Reincarnated as the evil sister, Marcia Blick, she plans to escape her abusive household with her sister, Larisa, and find the prince who will make her sister happy. However, when the prince unexpectedly proposes to her instead of Larisa, Marcia devises a "perfect ending plan" to ensure her sister's happiness.