The Unwanted Undead Adventurer

🇯🇵望まぬ不死の冒険者 · Nozomanu Fushi no Boukensha

MangaShounenOngoing🇯🇵 First published in 2017ActionAdventureFantasy

Haiji Nakasone story, art · Yuu Okano story

It's been ten years since Rentt Faina, a down-on-his luck Bronze-class adventurer, set his eyes on becoming Mithril-class. Unfortunately, Rentt finds himself helpless when confronted by a legendary Dragon in the Labyrinth of the Moon's Reflection...and is summarily eaten. But Rentt has miraculously reawakened...as a Skeleton?!

Synopsis via AniList