Reborn as the Family's Useless Daughter

She was the unfavored legitimate daughter of the marquis's household, born with a blood-red birthmark on her face. Fat, weak, and ugly, she was known as the ugliest woman in Fengming City. On the eve of her wedding, her fiancé cast her aside, making her a laughingstock once more. But she was an exceptionally skilled assassin and doctor, a modern woman from the 21st century, shot dead by the man she loved. Reborn in a new life, the ugly girl has an assassin's soul and extraordinary medical skills. Once her birthmark is healed, her beauty is enough to captivate the world! A poisonous, treacherous younger sister? Don't blame me for changing your fate, ruining your marriage, and leaving you alone for the rest of your life! An ex-fiancé who wants to come crawling back? Sorry, you're not worthy! On the road to revenge, she'll slay anyone who stands in her way, be they gods or Buddhas! But there is one young man in purple who, despite his noble status, never cares whether she's beautiful or ugly. He pursues her relentlessly, all for the sake of a promise.