Saving the life of the girl he loves, Sahu incidentally turns into a zombie. And now he's trying to survive in a stone jungle, believing that one day he will sing for the world.
Original webtoon
KIM Yong-Hwan
Related works
From Easy Going Scans:
A Demon Lord spirited the Princess away, and cursed her with eternal sleep. Countless knights sought to save her, only to die in vain by the Demon Lord's hands. But then, a Nameless Knight arrived to vanquish him and save the Princess, ignorant of what fate had in store for him...
Original Webtoon