Daraku no Kuni no Angie ~Kyoukai no Mesu Dorei-tachi~

Did you read "Alice in Wonderland" written by Lewis Carroll?
If not, then this alternative version of events for you.
The game tells about two girls named Angie and Ruby, who fell down the rabbit hole and ended up
in Wonderland (The Decadence-land) populated by peculiar, anthropomorphic creatures.