“The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible” OP:
“The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible” is listed with a total of 12 episodes in a single Blu-ray box.
Blu-ray Page Link from Official Website
Synopsis:
Normally, people choose to become adventurers in their teens. At 30 years old, Rick Gladiator bucks the trend by leaving his job as a guild clerk to become an adventurer. He begins as a novice F-rank with the fighting strength of an S-rank. After two years of brutal training with the continentβs strongest party, Orichalcum Fist, Rick will defeat anyone who underestimates him!
[Source: Crunchyroll]