The Heavenly Demon’s Discarded Disciple

When he wakes up, he has become the youngest disciple of the Demon Lord in a novel. On top of that, he is an astonishing genius who can grasp the essence of martial arts just by seeing it once. But unlike his genius talent, his body cannot keep up with martial arts...

He will become an absolute master who does not use his body by overcoming his unathletic build with telekinetic sword control!