What? That Fool Is the Sword Master?

The Story

A revered swordmaster with countless disciples chooses reincarnation to pursue higher mastery. He returns as a talentless young son of a concubine. His father despises him for his lack of skill, and others bully him relentlessly. The former master now hides his true power behind a facade of weakness. Everyone around him dismisses him as a fool. He remains silent while the world mocks his apparent uselessness.