Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town, Vol. 15 (light novel) — Toshio Satou

With Eve now in possession of a perfect Demon Lord's body, Lloyd takes off after her and toward the final battle. Once called the weakest boy in the village, he is now a hero, carrying his friends' hopes on his capable shoulders. Meanwhile, Eve follows her desires to the depths of the Last Dungeon, one move away from achieving her wish. Even the villagers of Kunlun couldn't stop Eve's powerful trump card. There's only one person who can beat her -- Lloyd, of course!