Miro in Memory

Haechan dreams of becoming a hero, saving Korea from the deadly Calamities. But as a powerless guard, he is seen as a weakling. That is, until he meets Miro, a mysterious girl who offers him immense power in exchange for his help in destroying the sacred Seal Talismans—the true source of the Calamities' wrath. Now, Haechan must embark on a dangerous mission to free the world from its torment, all while living a double life filled with secrecy, betrayal, and a growing conflict between heroism and villainy.

(Source: Webtoon Entertainment)