He was the king of the underworld fighting world in his homeland. He was young, handsome, and rich. Many world-renowned champions were no match for him. He loved...He lived for her and for battles...In one moment, all of it disappeared.He lost his life and even his name. She, whom he had lived since childhood, betrayed him by thrusting a knife into his heart...And in a completely different and faraway world, a recently deceased body lying in a dirty ditch unexpectedly opened his eyes. A new life stirred in this empty vessel.What will a person do with a second chance at life?What path will Kay follow, finding himself in a world ruled by power and skill?Martial arts rule!