Incremental Kingdom Storybooks is a series of Prestige Tree Mods created by hobbyist artist and amatuer game dev, new42ur3jeans.

While the games can be played without caring much of the lore, every game in this series would give an insight to the world of the Incremental Kingdom, with plenty of groundbreaking features/mechanics, characters, and story. If you are the lore-hungry kind, check out a webcomic made by the creator of this series (namely The Reimagined Bowlerville) to get an idea of the style of writing you're in for!

The Incremental Kingdom is a world, or one could call an Isekai, that is themed on increasing numbers and, obviously, Incremental Games. 

In the Kingdom, there lived different tribes that each helps each other to get the perfect number, and each tribe is based on the mechanics of The Prestige Tree (published examples being Challenges and Achievements). 

(SPOILERS FOR POTENTIAL YACT:A SEASON 2, SELECT TEXT TO SEE IT) 

However, there is also a Decremental Queendom that is themed on decreasing numbers (apparently Naan Bug is also part of that queendom). While parts of the Incremental Kingdom never really rejected the Decremental Queendom, most of them do, especially the king (you lower the exponent of your prestige resource to balance your game? You could be seen as a spy of the Decremental Queendom and the punishments would be real harsh for you). The Queen of Decrementy disliked the Incremental King's ideology of foreverly increasing numbers, given how only being able to increase numbers would lead to a lot of inconveniences, therefore sometimes the Queendom would attack the Incremental Kingdom, even the niches that accept the Decremental Kingdom. 

Things may look peaceful in the Incremental Kingdom for outsiders but multiple factors make the Kingdom 99.99% away from being a war holocaust dystopia. The games in the Incremental Kingdom Storybook series are the incidents where either something not normal happened in the Kingdom or the Kingdom is deprived of peace.