Okano Yu

After Rentt senses something wrong with his familiar, Edel, he and Lorraine leave Hathara and return to the city of Maalt. There they find the city on fire and crawling with thralls. Rentt finds Edel safe beneath the orphanage and learns through him that a single vampire might be the cause of all the chaos. Just as Rentt goes out to help rid the city of the thralls, he runs into the last person he wants to see in this situation—Gold-class adventurer and vampire hunter Nive Maris!

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 labyrinth 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!

By drinking a vial of vampire blood, Rentt Faina, undead adventurer, successfully achieved his next stage of Existential Evolution and has become a lesser vampire!Rentt, now short on funds, sets off on a journey to retrieve items required to craft equipment and weapons for his discple, Alize. With his faithful mouse familiar, Edel, Rentt sets off to the New Moon Dungeon, slaying his share of forest wolves and lizardmen. But is he prepared for the legendary monster that's appeared in the dungeon's boss chamber in place of the usual earth dragon...?Meanwhile, a priestess-saint and Gold-class vampire hunter shows up at the doors of the Stheno Trading Company, where the sale of the tarasque is to be negotiated. But they're here for one reason: the suspicion that a certain adventurer is actually a vampire in hiding...An undead with a dream, eternally striving toward the rank of Platinum-class, even in undeath! All this and much more in the fourth volume of Rentt's undead adventures!

Vampire hunter Nive Maris had rained Holy Fire down upon Rentt, the undead adventurer, to prove he was a vampire. But her plan only proved that he wasn’t a vampire at all! When Lorraine suggested that Rentt's divinity may have been the reason the Holy Fire didn’t work, they decided to travel to his hometown of Hathara to visit the shrine where he obtained his divinity.Rentt and Lorraine plan to leave Maalt for a couple weeks, but first they need to create wands and equipment for their disciple, Alize, before they depart. And in order to avoid trouble with people like Nive, Rentt needs to get his double registration at the guild officially approved by negotiating with the Guildmaster, Wolf Hermann. But as the man who oversees countless ruffians, Wolf is a force to be reckoned with!An undead with a dream, eternally striving toward the rank of Mithril-class! All this and much more in the fifth volume of Rentt's undead adventures!

Rentt the undead adventurer arrives at his hometown of Hathara along with Lorraine, a scholar and sorcerer. It’s his first visit in some time, and the village celebrates with a welcoming banquet. However, during the banquet, Rentt disappears. Lorraine finds him at a graveyard, where he reveals the incident that made him want to become a Mithril-class adventurer, and much more. Fighting powerful monsters and unraveling many mysteries, Rentt keeps climbing the ranks even in death!

Now that they can travel by teleportation circle, Rentt and Lorraine visit Vistelya, the capital of the Kingdom of Yaaran. Using Lorraine's magic to hide his identity, Rentt decides to check out the guild headquarters. While viewing the job board there, a Silver-class adventurer from Maalt named Augurey requests that he accept a job. They agree, but Rentt and Lorraine's fighting styles end up giving away their identities. They form a magic contract to keep their visit a secret, but then the God of Contracts appears! Once they’re able to return to Hathara, Rentt senses that something is wrong with his vampiric servant, Edel, back in Maalt...