Tensei Shita Moto Dorei, Saikyou No Kizoku Ni Natte Toshiue No Musume To Sekai Saikyou Wo Mezashimas

louis, a fighter who fights slaves in the stadium. finally loses his life in the match one day. however, the next time he opens his eyes he finds himself in a gorgeous mansion. louis is reincarnated as the sixth son of a nobleman! and one day after more than a decade has passed, sharon, a fellow slave from his previous life, appears in front of him. sharon, who was a child in his previous life, has grown into an adult woman older than him!?