A lowly slime barely survives an encounter with a hero and limps(?) his way home. He's mad about his lot in life as just a exp grab for some dimwitted hero. He's tired of the oppression of those wandering brutes and their swords and spells. He decides to fight back and create a safe place for slimes of all kinds to ooze about their lives.
This is his story...
You know the basic trope. A mob decides to be a hero, after some kind of miraculous event. But THIS time, it's a slime determined to make a safe space for him and his. The world is just like any RPG world with heroes, demon kings, dragons, etc and our gooey little friend has to overcome them. He'll need some help to avoid being a smear on some adventurer's boot. Can he recruit a strong enough team to all to accomplish his almost impossible goal?