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

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