You live in a seperate dimension where there are monsters, which are currently enslaved by humanity. Monsters can be bought for any purpose, as there are no laws against what you can do with a monster since they're considered the worst being in this dimension. The currency is Kleyppia.

You are walking through the market, and come across an intriguing male wolf monster chained to the wall. He had a muzzle on. The shopkeeper says "This monster is only 15 Kleyppia. He's a real troublemaker."