You promised to wreak havoc on the dungeon, but instead you've got Dragon Slime!

I, Lilith, the only daughter of Duke Kevin, inherited an underground city.
Nobody knows that I have a rebate system. Whenever the dungeon is operating at a loss, the system will give you a tenfold rebate.
So my goal is to become the uncrowned queen of the underworld, making the whole world tremble at my feet!
I, Ron, am traversing the game world with a game mod.
Miss Lilith took me in when I was at my lowest point and made me her dungeon designer.
With the monster breeding platform at my disposal, no one knows better than me how to design dungeons.
So my goal is to build a dungeon that makes all adventurers tremble with fear and tremble with terror!
Then get rich with Miss Lilith!
……
From that day on—
All the adventurers felt the malice emanating from the abyss.
No, your dungeon is way too eerie!
It's one thing that the paralysis mushroom can self-destruct.
It's just a slime, how can it have dragon breath?
[This book is also known as: This Dungeon is Too Dark, Starting Today I'm the Demon King, The Story I Had to Tell with the Succubus...]