Gedou Majutsushi no Hyouitan: Saikyou Kenshi wo Nottottara, Jibun no Karada wo Sagasu Koto ni Natta

A centuries-old magician who has prolonged his life by transferring his consciousness into new bodies wanders through a forest in search of his next vessel. There, he encounters a gravely wounded young warrior surrounded by the remains of numerous defeated monsters. The dying man proposes a bargain: in exchange for the magician's promise to protect his traveling companion, he will willingly surrender his body. As the magician accepts this arrangement, neither realizes that this seemingly simple transaction will lead them both down an unexpected path that will challenge everything they thought they knew about themselves and their world.