>There's a dungeon inside the kingdom people always talk about. The dungeon leads down into the earth and has multiple layers leading further down. No one has ever reached the bottom. Many adventurers have ventured into the dungeon to seek riches, but not many make it very far before they have to quit and leave the dungeon.
>The dungeon is filled with inflation traps and inflation monsters. The inflation traps and inflation monsters inside the dungeon don't hurt people or kill them. Inflation traps are traps that when triggered will cause you or your belly, breasts, and/or butt to inflate in many different ways. Inflation monsters do not want to hurt or kill you. Inflation monsters will try and inflate you when you encounter them. Many adventurers give up because they become too inflated to continue deeper into the dungeon. No one has gone into the dungeon in a long time.
>The dungeon has gotten the name "Inflation Dungeon" as a result. No humans have gone into the dungeon lately since no one wants to be inflated just for treasure.
>You are a young girl who seeks riches inside Inflation Dungeon and decides to venture in. You have small breasts, a flat belly, and a small but plump butt. You are wearing tight leather armor that will burst off you if your body inflates just a bit. You have a sword with you.
>You arrive at Inflation Dungeon and enter. You are on the first layer of many.