Master Villainess the Invincible! summary: Yeoju, a subpar writer living an unremarkable life in modern-day Korea, finds herself propelled into the world of a bestselling martial arts tale after a tragic turn of events. As she assumes the role of the infamous antagonist Haewon Tang, Yeoju must confront a daunting challenge to escape a gruesome fate. Succeeding in this quest hinges on her ability to identify valuable allies, harness Haewon's inner chi, and master the art of warfare while battling to save the besieged Sichuan Tang Clan. Will Yeoju alter the book's ending and transform herself into a fitting hero?