Once the best Special Operations agent in the country, Eren lost everything when the woman he loved died because of the corrupt system she believed in. The law failed her. So Eren abandoned it. One by one, he hunted down those responsible—mafia leaders, corrupt officials, even the Chief of Police. When the authorities finally cornered him, his revenge was already complete. With nothing left to live for, he stepped off a twenty-third-floor balcony. But death wasn’t the end. Eren woke up inside The Last Saintess, an Otome game famous for its beautiful characters and hellish difficulty. Eren woke up as Cassian Raven, the doomed villain destined to become the vessel of the ancient Lich King whose soul already resided in Cassian's body,--and the cursed grimoire that begins his downfall has already appeared. In the original story, Cassian loses control, massacres millions, and dies as history’s greatest monster. And somehow… the story’s most infamous villainess is his fiancée.