Yu Okano: 4 books

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...

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 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...

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 disciple, Alize....