He was the most feared man in Korea.She was the woman betrayed by his family.Their marriage was supposed to be fake.The consequences were not.When Lee Eun-chae walks in on her fiancé cheating the night before his birthday, her world shatters in a single breath. Five years of loyalty reduced to a cruel insult. Humiliated, furious, and desperate for revenge, she does the unthinkable-she proposes marriage to the one man powerful enough to destroy the Park family from the inside.Park Kang-ho, known as the Black Lion, is a ruthless CEO, a kingmaker, and the man every chaebol fears. Cold. Calculated. Untouchable. When Eun-chae offers herself as his wife in a contract marriage designed to secure his empire, he accepts without hesitation.The rules are clear.No love. No weakness. No feelings.But as scandals erupt, enemies close in, and buried secrets resurface, the line between performance and reality begins to blur. Their staged affection ignites real desire. Their strategic alliance turns dangerously intimate. And the woman who was meant to be a shield becomes the only person capable of breaking the Black Lion's iron heart.In a world of power plays, family betrayal, and media firestorms, Eun-chae must decide how much she's willing to sacrifice-not just for revenge, but for love.Because falling for her husband was never part of the contract.