The Flawed Swordsman Becomes a Conqueror

Once, in a certain frontier arena, there was a strongest swordsman who built a legend of a thousand battles without defeat. That man suddenly vanished, leaving behind only the alias [Demon Blade Slayer], and is regarded as a phantom swordsman whose true identity is unknown.

Three years later. The largest nation in the world, the Kingdom of Kadin, announced the holding of the greatest sword-fighting tournament in history. Its name is [Hundred Blades Great Chaos]. The match format is entirely unknown. A boy named Shuu visits the royal capital, where contestants from all over the world have gathered to participate in this tournament that claims to "grant the winner's wish" by gathering 106 powerful fighters. There, he ends up having a match with a man who is a participant in the [Hundred Blades Great Chaos] and who calls himself [Demon Blade Slayer].

The true identity of that boy, which no one knew