The Unwanted Undead Adventurer Manga Volume 12 features story by Yu Okano and art by Haiji Nakasone.

Having overcome his former masters' trial, Rentt learns about his hometown's ancient secret. Its dizzying scope is beyond anything he could've imagined: a bloody history, a forgotten dungeon, and long-lost magic... but those are just the beginning.As Rentt and Lorraine come to grips with their discovery, Gold-Class adventurer Nive and her compatriots work to root out the vampires planning to attack Maalt. They're moving quickly to prevent tragedy from occurring, but are they already too late?