The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible - S01

Thirty-year-old Rick Gladiatol works as a humble clerk at the adventurers' guild, but he still holds on to the grand dreams he had as a child. After a fateful meeting with the dark elf Reanette Elfelt, he gets a chance that comes only once in a lifetime. Reanette is an elite adventurer in the legendary party Orichalcum Fist, and its members agree to take Rick in, on one condition: he must endure their brutal training. Two years later, Rick is finally ready to take the E-Rank exam that will make him an official adventurer. But raw magical power can only grow until a person turns 20. Because of this, Rick faces hostility from the other participants and the examiners alike, leaving him no choice but to show the world that his hellish training has made him an invincible warrior.