Dark Devotion: The Vampire Tycoon's Bride

Elena saves a billionaire with pure blood, unaware he is a 3,000-year-old vampire CEO. That night, her father and his mistress seize the fortune and evict her sick mother and blind brother. For the bills, she becomes his contract wife. Under his ruthless devotion, she avenges her mother and breaks the human-vampire taboo with an eternal blood vow.