i think the question was made because it says the apk is of only 5MB
Viewing post in Quest for the Dream Girl comments
Ahhh! that's because the RPG Maker (the game engine of the game) exports the Android version to use a web version... so... we have the web version... the Android downloads the maps on demand from the web version... and let it in your phone... when we update the web, it download the changes, so you don't even need to update the APK. Just in case we switch our webserver.