Instead of going around clearing dungeons, why not build your own?

Story: A lazy young man is summoned to a fantasy world. But as he just wants to sleep, he does not become a hard working hero. No, this man becomes a dungeon master. (If you don't know, a Dungeon Master is the person that decides which monsters are around, where to put treasure chests and which traps you want, stuff like that.) In simple words, he sleeps while ordering monsters to fight the invading adventurers. Lazy, but cool.

So while this is an isekai story, it's still different enough to make it fresh and interesting. There's no big plot lines like saving the world, or killing the demon king. It's all about creating a home / dungeon to be able to survive. There is a lot of strategizing and it is a fairly slow moving story. The world building is a huge part of the story. If you want see characters grow and become stronger, this is a great story. But if you want fast moving fights with a clear goal, maybe you should buy something else.

Art: The art in volume one had some below average illustrations, but later on the art is pretty good. With a good mix of Sexy, Cute and Funny, it's hard to complain. Heck, at volume 10, I'm amazed at how beautiful the art is. It's usually pretty girls being shown, rather than a cool pose by the protagonist. Personally I like it that way.

Characters: Main Heroine, Rokuko, the dungeon core. (literally the heart of the dungeon) She is a typical stupid, big boobed blonde, in the beginning. She slowly learn what to do and how to avoid being destroyed by invaders, and eventually she might even be called dependable. Her not being human makes her cold and calculating. The protagonist has commented on the "psychopathic tendencies" displayed by Rokuko. But she's not THAT bad.... yet?

Main character Keima, sleeps much to help naturalize time skips early in the story, but his personality is surprisingly well made. Not too smart, nor is he a saint that wants to save everyone. Along with his foot fetish, he's among the most natural protagonists I've seen in a long time. He can kill people, when they are douche-bags, but avoids killing whenever it's possible. A typical protagonist with a Dark Hero vibe. (Momonga, Naofumi, etc) Oh, he's ridiculously strong as well. But that's the standard for fantasy stories. But I like him, he somehow feels very relatable. And that is very rare.

Overall, If you like the concept of dungeons and adventurers, this story might be entertaining for you. The world building is perfectly made, not too exaggerated nor boring. All of the arcs are entertaining, and the characters have a nice harmony to them. But this story is without a doubt half-assed. The Protagonist is a dungeon master, enemy of Heroes (Heroes help to destroy dungeons). But he's also an adventurer, you know, the people that actually invade dungeons on a daily basis. He has a harem, but he never does anything. This is a story to be enjoyed without hoping for anything big to ever happen.

+ Solid Protagonist
+ Good Dungeon System
+ Rokuko is so cool, she deserves a plus
- Lack of adult situations

I did not enjoy the first volume, there is a huge amount of short time skips, along with a Day counter, but the story do gets better. So if you buy the first volume, know that it's the worst volume in the series. So if you like it even a little, you will love the series as a whole.

The lazy way to describe this lazy dungeon tale, is to quote Merlin, "Fu*king Spectacular".