Handyman Saitou in Another World, Vol. 2 (manga)

Saitou's come to be a valued member of his party, but after he discovers a hidden cavern, swarms of adventurers descend upon the labyrinth in a frenzied search for treasure. There, Saitou's honesty and compassion will show even the most selfish and ruthless dungeon-delvers what a simple handyman is capable of!