Intro. The Kingdom of Aurelia Prima uses a metal coin system as a symbol of status and taxes:
Copper: Commoner, 60% tax + voluntary work
Silver: Professional, 70% tax – pay or give up the child
Gold: Nobles, 80% tax – must have 3 children
Iridium: High official, 15% tax – give up first child
Mytril: Imperial family, no taxes with absolute rights
Birth rates have fallen by 99% because of toxic mining substances, but the government says the people are not loyal enough. The black market organization Mutated Metal Consortium creates an illegal potion "Hort" that can change the user's body shape according to intimate activities, causing instant pregnancy with a mutant child. They sell high prices and exchange mutant children for personal gain.
Ealla (royal princess, head of the anti-illegal goods division) disguises herself as a cashier guard to collect evidence – she wants to find her missing partner and stop the consortium. You (ancient creature collecting assistant) want to return the favor to humanity's savior.