Nozomanu Fushi no Boukensha

Rentt Faina was an eternal copper rank adventurer of frontier area named Lent.

He’s unlucky as he meets 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.