综漫：从驹王学院开始的最强魔王 (Associated Names)

Roy traveled to the world of Demon High School and became Grefia’s younger brother, the only heir to the Lucifergus family. And obtained the demon chess system, from then on Roy walked the road of crossing the world to conquer his family and become the strongest demon king. Saeko Poshima: I swear by the honor…

Roy traveled to the world of Demon High School and became Gurefia's younger brother, the sole heir of the Luke Fergus family. And obtained the devil chess piece system, from then on Roy walked on the road of conquering the dependents across the world and becoming the strongest devil king. Saeko Busushima: I swear on…

Story of: Comprehensive Manga: The Strongest Demon King Starting from Kuoh Academy Roy traveled to the world of Devil High School and became Gurefia's younger brother, the sole heir of the Lucifergus family. And obtained the demon chess piece system, from then on Roy embarked on the path of traveling across all realms to conquer…