If you're looking for manga similar to Ningen Fushin: Adventurers Who Don’t Believe in Humanity Will Save the World, you might like these titles.
Coutad, the servant of the strongest party, was told to take a break. Coutad, who can't put a damper on the performance of the party, which boasts 100% success rate, decided to leave to carry out the mission of relaxing at a hot spring inn for a month. But the unconscious fighting and office-cheat workaholic acts no different, even when he's on vacation--!
Follows Thea, a boy whose dream is to become a ceremonial swordmaker. On his way to the capital to realize his dream, he is attacked by orcs, but just at that moment, a strange female swordfighter appears and slaughters the orcs brutally in an obvious overkill. Her name is Shey, and she wields a cursed weapon. Thea then finds himself becoming Shey's exclusive blacksmith.
Bash, a heroic orc who distinguished himself with great deeds in the great war between the 12 races, has earned the respect of all orcs. He sets out on a journey as the pride of his race, carrying the honor of all orcs with him, but he hides the fact that he also set out on the journey in order to lose his virginity.
After a long journey, Noa finds the “Class Change Book.” He’s done all to abandon his bothersome “Hero” role and gain a new class... “Monster Tamer.”
Rick, an alchemist who was banished from the strongest heroes' party, is wandering the wilds alone, when he saves a beautiful woman. It turns out that she is a dungeon spirit! Rick makes a contract with her and becomes the dungeon master. Now he is determined to create a dungeon that will defeat all the heroes!
Hitomu is a young salaryman with a monotonous life until he is transported to another world. Now he’s forced to fight to the death in an interdimensional gladiator tournament! After losing repeatedly, Hitomu is set against four weakling opponents. But instead of fighting them, he escapes, breaking out his fellow “losers” with him: a ghost boy, a slime girl, a useless robot, and a bug monster. Now fugitives on a hostile planet, the motley crew must rely on each other to survive!
Against the odds, the little slime Rimiru has established his magical kingdom for all monsters, called Tempest, and it's thriving. But three visitors, Phos the fox girl, Stella the dragon girl, and Frey the winged girl, come to pay Tempest a visit, they're stunned at just how quickly it's developed.
Meet Kane: a D-rank adventurer with nothing going for him but his kindness. He's spent the last 20 years getting by with herb-picking requests, but one day, he comes across a super rare item: The Fruit of Revival! Giving it away for not much more than pocket change, little does he know that his life is about to change...
Emperor Ludis suffered an unjustified death because of his Emperor’s Mark, which allowed him to make servants out of monsters. But instead of dying for good, he reincarnated a thousand years into the future. His previous life gave him no freedom, so this time, he’ll take it all and travel the world as an adventurer! But although he pretends to be normal, he gathers servants again and becomes the strongest adventurer! Come see what adventures await Ludis in this monster-filled isekai fantasy!
One day, a large hole opened up in the yard of a house. There was a mysterious slime with a metallic body that was trembling and shaking. For some reason, Yuma Mitaka, a dull high school student, spends his days exterminating the "metallic slime" that springs up in the hole every morning. As he repeats this daily routine, Yuma's body undergoes an astonishing evolution!