Raniel, the promising wizard and the prospective owner of the most renowned magic tower in the kingdom, gives up his title and leaves to join a heroes’ party led by Kyle, the warrior. Along with the other members, Raniel sets out on adventures to slay the Demon Lord—the evil being who trampled his village long ago. He spends four years defeating the dark forces and grinding half of his life to save his team, only to find out that his effort has been in vain. Kyle suddenly kicks Raniel out of the party one day, claiming that their goals are different. Devastated after getting betrayed by his team, Raniel decides to return to the tower, but things grow worse when he runs into a succubus queen on his way back, gets cursed, and realizes… he has turned into a girl?!

Horror of the Continent: The Immortal King Brings Despair, While the Light Knight Defies the Divine Will. In an era of chaos, numerous heroes emerge, striving to navigate the tumultuous land. However, amidst this turmoil, sudden and enigmatic forces make their appearance on the continent. Little did they know, it was all me. …To be precise, they were my alter egos sent to this other world. #Unintentionally becoming the villain of the world. #Somehow, I become both the demon king and the hero. #One person, multiple roles.

A young man who had longed for stories of good and evil since childhood lost his life in a tragic accident and was reincarnated as a boy named Chrono Mak in another world. He learned that in this other world, there is magic and witchcraft, and depending on how you train them, you can become as strong as you want to be, so he decided to become the strongest demon king in order to recreate the story of justice and evil he once dreamed of.