Two thousand years ago, a war between immortals and demons took away his most precious person. From then on, he no longer had extravagant hopes for love. Seemingly cynical, he only pursued one kind of woman, a woman who was similar to her, even if it was just a look or an action. And the appearance of this girl, a perfect host body, this fake dead person who looks nothing like her is actually the necessary tool to resurrect her. He takes the ignorant girl on an adventurous journey to slay demons.