Eldmia Ega, the Reincarnated Avenger

Given a second chance at life, a young boy is reborn in another world as Eldmia. But his peace is violently shattered when a demon army burns his hometown to the ground, ripping his beloved parents away from him all over again. Standing on the absolute brink of despair, he crosses paths with an elven mage named Asilier. Taking her on as both a master and an older sister figure, he moves in with her. Under her guidance, his raw magical talent explodes. He spends his days relentlessly honing his skills, determined to stockpile enough power to protect the people he loves. But his destiny takes a massive turn the day he meets a young girl—the sole survivor of a ruined noble house. Mess with him, and you die. This is the unrivaled battle saga of the strongest kid alive, ready to absolutely trample anything in his path!