Rin is "visitant" girl in other world (from this world). The other world is can't using this world language (Japanese/English). She learining "Juliamo" (other

Rin is "visitant" girl in other world (from this world). The other world is can't using this world language (Japanese/English). She learining "Juliamo" (other world language, like a Esperanto). Ruka (native girl in other world) to help for leaning. Through the game, you can truly learn Juliamo.