Shinmai Ossan Boukensha, Saikyou Party ni Shinu hodo Kitaerarete Muteki ni Naru.

The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible

It is common knowledge that it is best to be a courageous when you are as young as possible because the magical power that is the basis of a courageous strength, hardly you do not train it, when you are young. But this man, Rick Gladiator, who became a courageous when he was older than thirty years old, was the fighter power of an S-Rank adventurer, the highest rank in the world. In fact, Rick has lived an unimaginable life with members of the continent’s strongest courageous party, veteran Orihalcon fist. From the dragon to the vampire, for the battle of Rick, trained by his literal “demon” masters, allowing him to defeat the aristocratic courageous people one after the other who tries to underestimate him.