If you're looking for manga similar to Shitsugyou Kenja no Nariagari: Kiwareta Sainou wa Sekai Saikyou deshita, you might like these titles.
In the present era, adventurers, demons, heroes, and demon lord, are no longer occupations that put one's lives at stake. With the world at peace, it is an era where conquering dungeons has been transformed into entertainment. Adventurers and monsters are able to fight with a substitute body made of magic, popularizing dungeon conquests with no deaths. Having lost his job, the “Black Mage” Remme struggled with finding another party until one day a beautiful woman appeared before him telling she had a job for him.
2 votes
Both MC where they part of pepole paty but, thye where kicekd cuz they magic dosent look good. But now they are hired by demons king.
Both get abandoned by their partys and join forces with the demon lord. The maine characters are also both kind of overpowered and take over some control of the demon army.
His father is a sage and his mother is a martial artist... Yuan is a boy whose parents are the strongest humans in this world and they raised him making him believe he's "weak". However, he can pulverize giant rocks with a flick of his finger and he hunts and eats dragons, believing they're just "lizards". His daily life isn't normal at all!! If you're raised by the strongest, it's only natural that you're going to be the strongest too. This is the story of a peerless boy who knows nothing of the world but he's about to shake it!!
1 vote
Both MC are OP but they are not aware of that. And both of them are child.
Both of them are kind and they trying to help another pepole with they power.
I’m a demon lord?! Blessed with unlimited freedom in this new world, it’s time to live the good life building the perfect dungeon! Reborn in another world as a demon lord, Yuki plans to use the incredibly handy online store that is the DP Catalog to create a super sinister dungeon where he can live the easy life! But the moment he starts his new life, he encounters the unimaginably strong Supreme Dragon. Just when he thinks the end is already nigh, things take a bizarre turn in his favor! The Supreme Dragon, who turns out to have a major sweet tooth, transforms into a lovely young girl hell-bent on freeloading off him. And she’s not his dungeon’s only new resident. Within days, he summons an adorable slime and rescues a sweet little vampire girl too! While taking care of his new family, Yuki experiments even more with the Catalog by learning how to create his own weapons. Their idyllic days don’t last long, though, as an unexpected menace appears...
1 vote
There is dungeon managment story and "romance" in both: one with shotacon, and the other with lilicon
Shitsugyou has a candid OP main character and seem to be more story oriented whereas Maou ni Natta is more focus on slice of life element with an more standard MC "not-to-much" OP
A party of 4 heroes defeat the Demon King, however with his last bit of power he separates and gives each of them an unusual curse to make them suffer for the rest of their lives
Born into an aristocratic family of a large country, a boy with insufficient magic power bade farewell to his unlucky daily life. Because of his encounter with a Demon, his fate began to change. This destined meeting changed the boy’s life, affected his surroundings, and soon after, shook the entire world.
500 years after the strongest demon lord was defeated by the heroine Mia, Al, the lowest adventurer, who was tricked by the hero (a descendant of the hero Mia) and obtained a cursed sword. However, the sword caused Al to regain all the power and memories of the demon lord. As the reincarnation of the demon lord, Al embarks on a journey to eliminate the rotten heroes.
Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself. Then, one day a demon stronger than himself suddenly appeared in front of his eyes. The demon said "You seem quite strong. Don’t you think someone that strong should become a Demon Lord?". He tried to negotiate but he had no right to refuse.
The new demon king, Vermot the 13th, is bored of his life in the demon kingdom, so he decides to take over the human world. He heads there with his sword and his pretty maid, Sara. With his powers and abilities, he is easily able to take over the first kingdom he targets, reduce the surviving princess to his pet, and slaughter any righteous heroes that come his way. He loves how he can take whatever he wants with his own power in this new life, rather than it already having been given to him (as in the demon world). He's not planning to stop his conquest anytime soon...