Nozomanu Fushi no Boukensha
Other names: 事与愿违的不死冒险者, 望まぬ不死の冒険者, 바라지 않는 불사의 모험자, The Unwanted Immortal Adventurer
Author: Okano Yuu
Artis: Nakasone Haiji
The protagonist was an eternal copper rank adventurer of frontier area, Lent. He’s unlucky as he meet a powerful monster inside of the labyrinth, got defeated, and when he noticed, he already became a bone man《Skeleton》. Agonizing since he can’t enter the town with his current condition, he’s recalling about the existence of monster evolution, with a goal to gain a body with muscle, he defeats the monsters of the labyrinth.