A boy raised by a demon king and a dragon king seems to be peerless in his school life.

Missing chapters fixed volume 6 chapters 12,13,24 and 25. By a twist of fate, the young boy, Ruisha, found himself trapped in an alternate dimension created by a hero. There, he unexpectedly encountered the Demon Lord and the Dragon King, both of whom were defeated by a hero three hundred years ago! As Ruisha befriended the Demon Lord and Dragon King, they began to train him. Transformed from a frail boy into a formidable warrior known as the 'Demon Dragon Knight,' he harnessed the combined powers of demons and dragons, achieving astounding growth. After using his newfound strength to escape the alternate dimension, Ruisha enrolled in a magical academy, rumored to be attended by the descendants of the hero. His goal? To aid the still-sealed Demon Lord and Dragon King. Having undergone an incredible transformation through the guidance of the Demon Lord and Dragon King over countless years, Ruisha is now poised to wreak havoc in the magical academy!