Kishima began writing the fantasy adventure novel on the Kakuyomu website in June 2018. Hobby Japan acquired the novel and published the first volume under their HJ Novels imprint in December 2018, featuring illustrations by Tea (Akuyaku Reijou Level 99: Watashi wa Ura-Boss desu ga Maou dewa Arimasen). The 11th volume was released in December 2022.
Ken Ogino began serializing a manga adaptation in Comic Fire in November 2019. The seventh volume went on sale on April 1 (pictured).
Synopsis
It is common knowledge that it is best to become an adventurer when you are as young as possible because the magical power that is the basis of an adventurer’s strength will hardly grow if you don’t train it while you are young. But this man, Rick Gladiator, who became an adventurer when he was over thirty years old, had the combat power of an S-rank adventurer, the highest rank in the world. In fact, Rick has lived an unimaginable life with the members of the legendary Orihalcon Fist, a party of the continent’s strongest adventurers. From dragons to vampires, Rick’s fighting prowess, trained by his literally “monster” mentors, allows him to defeat elite adventurers one after another who try to underestimate him. (Source: MU)
Novel special site: https://firecross.jp/hjnovels/series/330
Manga special site: https://firecross.jp/comic/series/331
Source: Comic Fire
Shinmai Ossan Boukensha, Saikyou Party ni Shinu hodo Kitaerarete Muteki ni Naru. on MAL
