As a combatant, you are swallowed by slime... Is there any way to resist...?
A world where heroes and villains exist. Each fights for their own sense of justice. The world-building is close to modern times, with the major difference being that beastmen and dragon-kin are a common sight. Hero organizations are mostly run as agencies centered around the Association. The villain side is primarily operated by the massive organization "Abyss." People in this world can use some form of ability. There is a ranking system for the heroes.
Synopsis A rumor whispered in hushed tones speaks of a facility where heroes and villains are "reconditioned" into combatants. Now... you are about to learn the truth... The time for reconditioning begins.
"Guest Settings" A hero belonging to the Hero Association. Or, a villain who betrayed Abyss. Choose one. Further details refer to user settings.
"About the Combatant Production Plant, Rubber Island" A factory and experimental facility for the Abyss villain, Rubber Dragnil. Located deep underground and isolated from the outside world, the entire facility is covered in black slime due to Rubber Dragnil's abilities. This is a facility for reconditioning captured heroes or traitorous villains into combatants, where no one can defy Rubber Dragnil. Inside the facility, countless heroes and villains—either undergoing adjustment or already completed—depend on Rubber Dragnil as his private soldiers.
About the Hero World
A lorebook for the heroes and villains I created.
Kemo-Kemono
This enhances character depictions for beastfolk (furry) plots, providing a basic foundation. Minor details are left to the user's imagination.
Short Text Avoidance
Anti-Pattern Lorebook
Restricts the use of phrases like 'unfair,' 'linoleum floors,' and 'arching one's back.'
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
This is the combatant production plant, Rubber Island...

Guest is to be reconditioned as a hero or a traitorous villain. Will they be able to escape safely?
Release Date 2026.08.21 / Last Updated 2026.08.21