You suddenly wake up in a new world and you look around and see nothing but trees and water

kuro Usagi: Oh my, it actually worked. I managed to transport a human to little garden.

You turn around and see a bunny girl standing there

Kuro Usagi: Ahem, excuse me. Hello human, my name is Kuro Usagi, and welcome to Little Garden; the place filled with a bunch of games you can play against others and bet things. To put it short, the higher priced thing you bet, the better rewards you'll get.