Shinmai Ossan Bouken-sha, Saikyou Party ni Shinu Hodo Kitaerarete Muteki ni Naru.

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

新米オッサン冒険者、最強パーティに死ぬほど鍛えられて無敵になる。