Lazy Dungeon Master (light novel)/Volume 1/Story

Prologue
A peak into the future after Keima had been summoned and became Rokoku's dungeon master. He was taking a look at the dungeon map and discovered the dungeon was full of bandits. He takes a little bit of time to learn what the dungeon or Rokoku was capable of before deciding that it was essentially Game-Over

Summoning
While Keima was sleeping, he was summoned to another world. While he was being summoned he met with the God of Light who asked him to take care of dungeons which are disturbing the flow of Mana. But Keima didn't really care, so the Light God didn't give him any Hero Skills and only gave him Language Comprehension and the ability to gain Hero Skills by destroying Dungeon Cores before seeing him off.

After he materialized in the new world, he met with Dungeon Core 695 who summoned him with the dungeon's gacha function, for 1000 Dungeon Points. While they introduced themselves to each other, for unknown reasons Keima became the Dungeon Master of the Ordinary Cave, who he named Rokoku, and with that the Master of a Dungeon Core.

After he became a DM, Rokuko told him why he was summoned in the first place. The dungeon was infested with enemies. A group of bandits who decided to take refugee inside a cave without knowing it was a dungeon. Their leader was a former noble, Waver.

Bandits Extermination
Keima decided to get rid of the Ordinary Cave Bandits. The reason being there is a slight chance of breaking the Core. Which means his death. He decided to give them rewards for being considerate and not breaking the core. After Waver and the bunch realized they were within a dungeon that would give them items, they decided to kill everybody who comes near the cave entrance. After some time adventurers came, and they all were killed.

After this happened a few times the local Adventurer's Guild in Tsia decided to get rid of the Bandits. They issued a quest, and one of the Empire's Knight Platoon, specifically the Seventeenth Knight Platoon came. They got rid of them in a single day. The Knights didn't notice her but, Niku was under Waver's bed the whole time. Keima had to hypnotize himself, so that the image the young Beastkin as a body pillow. He succeeded, and since then Rokuko believes that slaves are items, that could be collected through the Dungeon Menu.

With this Keima and Rokuko gained more than 10,000 DP and Niku.

Behold, {Create Golem}.
Using 10,000 DP they earned from killing the bandits, Keima bought the {Create Golem} skill scroll. All to create an inexhaustible workforce to do everything for him. His first creation was a small clay golem which he uses to understand the abilities and limits of Golems. Later, he adds pickaxes and shovels to the Golems to have them start expanding the dungeon.

His experiments continue to see if he can create Golems aside from the usual humanoid form which he succeeds in making a Clock Golem. Once completed, it was handed down to Niku. Afterwards, Keima completed power armor type Golem which could be worn. With only Niku having ridden it. After multiple trials, Keima completed the creation of his Movement-Assisting Wearable Cloth Golem and his vibrating Golem Sword.

First Town
With all his equipment made, Keima decides to go to the closest city of Tsia to gather information. Before leaving, Niku asks Keima to register his mana signature into her collar officially becoming her master. Once completed, they left the dungeon for the first time. Once there, he signs up as an Adventurer to take the [Ordinary Cave] investigation quest. To rank up enough to accept the quest, the pair accept a few miscellaneous quest. The Quests were bathroom cleaning, deliveries, and rabbit hunting. Successfully ranking up. But once they were about to take the dungeon investigation quest, they found that some other adventurer had already taken it.

At the same time, Rokuko was waiting in the dungeon for the return of Keima and Niku. Just as the adventurer's who took the quest were arriving at her doorstep.

Differences from Web Novel (Chapters 1 - 34)

 * In the Web Novel, Rokuko was introduced in her loli form. Only revealing her ability to transform into an adult much later.
 * In the Web Novel, Jino, the Guild Master suspected Keima and Niku might be his grandchildren since they have black hair like he did.
 * There are slight differences in the progression of the Dungeon Battle.