Dorei Tensei: Sono Dorei, Saikyou no Moto Ouji ni Tsuki : Ars, the prince of the Kingdom of Karitz, who was called the strongest wizard, died at a young age. But on the verge of death, he uses reincarnation magic. Reincarnated as Wals Sai, a slave with the best body! Wals, who be