Before I realized, I had become the guardian of a dungeon, a Demon Lord. I was suddenly in a dangerous world with giant monsters loitering around, fighting for their existence, so I thought to go about developing the dungeon in order to not die but —- for some reason I was having quite the good time…. How did it turn out like this?... more>>

The protagonist, Yuki, having to live in that world now, uses his bold and sharp senses and spends time with a supreme dragon girl and a vampire girl; Sometimes laughing, sometimes being angry, passing days doing what he likes.

(Source: novelupdates) <<less

Masuda Keima, a lazy high-school boy who prefers to laze around and avoid working, gets summoned as a dungeon monster by a girl avatar named "Dungeon Core No. 695" who is the dungeon core of the mighty one-room dungeon "Ordinary Cave".... more>>

Through a mishap she accidentally assigns him as her Dungeon Master, so first order of business is to get rid of those pesky bandit invaders that have set up camp near the heat-emitting dungeon core before they get the idea to smash it and kill them both. <<less

Baphomet, the boss of the [Tower of Abyss], waits for a strong hunter who is able to fight on equal grounds against him.... more>>

When he had grown bored of the repetitive battles, he began to gain interest in the world of humanity due to the trophies he had obtained from the dead hunters.

At the same time, he became further entranced by the existence of humans when the strong hunter he had always wished for appeared before him. <<less

In the year 20XX, God put the "World Salvation Project," into motion to save humanity from heading towards its destruction. As a result, Kurosaki Shion,... more>> a college student who continued to struggle in a broken world, was picked to be the demon king. As he repels the self-proclaimed hero as she leads the raid on his dungeon, a war for supremacy between the demon lords unfold?! <<less

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skills. They are the Demon Lords.... more>>

Demon Lords entice people to come to the labyrinth they have built and eat the people´s despair as their nourishment.

However, Creation Demon Lord Procell has decided that he will obtain people´s hopes and not their despair as nourishment, and built a happy town instead of a malicious labyrinth to collect human beings. <<less

Sick of the trickery in the royal court, former knight captain Hans now serves at a remote station in the countryside. But his peaceful and... more>> idyllic days end when some Japanese people with superhuman abilities suddenly show up. <<less

One sunny leisurely day, a woman visited my house and asked me if I were interested in managing a dungeon along with support from goddess.... more>> But of course, I refused. Eh? Shouldn't I ignore a person in trouble, moreover if it's a beautiful woman? No way! That's too bothersome, and why do I have to do that? I'm perfectly satisfied with my comfortable life now, throwing it away is just overly stupid...... ...sigh, fine, so it's go to another world, become a dungeon master, manage a dungeon and deal with the Mana circulation problem? Understood, but how to do it? <<less

Akira the Dungeon Master: From Weakest to Strongest! Reborn in another world as a dungeon master, Akira Hanamura constructs a cozy dungeon within just 30... more>> minutes. However, there's one major flaw—this "perfect" dungeon has zero defenses against the flood of adventurers seeking its treasures. It’s a ticking time bomb where being conquered means instant death for Akira. In this desperate situation, Akira discovers the potential of his unique 《Reproduction》 skill. To survive, he must expand his forces by creating new monsters, utilizing both female adventurers and monster girls as vessels to grow his dungeon's strength. What starts as the weakest dungeon turns into a relentless rise to power as Akira battles to create the ultimate stronghold. An erotic and high-stakes dungeon-building fantasy born from Nocturne Novels—prepare for a thrilling journey of strategy, survival, and unexpected alliances! <<less

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