How could there be a manga where the main character had great strength but was very weak? Using energy once would hurt his body and other characteristics, and the main character had to be handsome?

I recommend you a novel called "All I Hit Is Real Harm". The male protagonist transmigrated to the future world to become a martial artist. Because his ability was too powerful, every time he used it, it would cause serious damage to his body. He could only constantly seek a balance between the control of his power and the endurance of his body. I hope you like this fairy's recommendation. Muah ~😗