This is a BL based on "Become a Demon King Today".
Protagonist: Von Byreferut Paulflam (the first three princes of the real Demon Kingdom, the ten nobles, and the current demon king's favorable former fiancée, referred to as Xiaobao)
Yuri Shibuya (the 27th generation Demon King of the Real Demon Kingdom grew up in Japan on Earth and can travel between two spaces)
Ausabel (original character)
Character: Mrs. Jerry (the mother of Xiaobao, the former Demon King of the True Demon Kingdom)
Guyindalu (the ten nobles of the real demon country, Obao's eldest brother, a helpful and capable assistant)
The three brothers Conrad (favorably named Dad and Xiaobao's two) are all half-brothers.
Junda (the ten nobles, the most advantageous and capable king)
Takeru Murata (Beneficial classmate, the great sage with 4000 memories of the real demon kingdom)
His Majesty the True King (the founder of the True Demon Kingdom, each Demon King is appointed by him, it is not a hereditary system)
Guleta (adopted daughter of Lee and Paul Fram)
Anicina (Ten Nobles, Inventor, Red-Haired Witch)
Izala (Junda's adopted daughter, doctor)
Shibuya Seungri (Beneficial Brother Earth Demon)
The cover shows the two protagonists
Intention: