Rentt Faina, a twenty-five-year-old adventurer, has been hacking away at monsters for a decade. However, without much talent for the job, Rentt finds himself stuck hunting slimes and goblins for meager amounts of coin every day. Little does he know, all this is about to change when he comes across a seemingly undiscovered path in the Water Moon Dungeon.

What awaits him at the end of the path, however, is neither treasure nor riches, but a legendary dragon that wastes no time swallowing him whole! Waking up a short time later, Rentt finds himself not quite dead, but not very alive either— He is nothing more than a pile of bones! Armed with nothing but his trusty sword, tool belt, and ghoulish new looks, Rentt sets off on his quest as a newly reborn skeleton to achieve Existential Evolution, hoping to one day return to civilization with a more human form.

Will Rentt succeed, or will the dungeon consume him for the rest of his un-death...?

Rentt Faina has achieved Existential Evolution, evolving from a Skeleton into a Ghoul. His next objective: rising the ranks and becoming a Copper-class adventurer! But to do so, Rentt must face his next greatest challenge... A written test?!

Using his years of wisdom and the help of two companions, Rentt tackles the challenge head-on. But the worst is yet to come as Rentt finds himself in yet another pickle as he tries to prove his innocence to none other than trusted guild member, Sheila, as she raises concerns over his potential involvement in a recent string of adventurer disappearances.

On his journey, he accepts a new quest, leading him to a new area that pits him face-to-face with a mighty monster of the bog! Will Rentt make it out alive to prove his uninvolvment in the disappearances and retrieve a highly-valued medicinal herb? Or is this the second end to the fate of our hero as we know him?

Rentt Faina has successfully overcome the menacing Tarasque standing between him and the Dragon Blood Blossoms he seeks. But then, in the depths of the Swamp of Tarasque, a well-dressed man appears before Rentt, proffering a quest of his own on behalf of the highly-revered Latuule family...

Offered an exceptional reward for the collection of Dragon Blood Blossoms, Rentt visits the Latuules, only to find himself trapped in a maze! Seeking a way through to reach the Latuule family manor, he stumbles across an opening with beautiful roses and...a table with teacups?

“Are you giving up?”

Will Rennt make it out undead enough to achieve his objective of becoming a Mithril-class adventurer?! A young girl's invitation to tea-time may be Rentt's only means of escape!