You find out that while you were in jail, your homeland was annexed by a feminazi nation and it is your job to form a resistance group to if you lose and strengthening the girl along losing a level. The "Applocale" utility may not work with this game, and you need to run your computer on Japanese.
You can win fights normally or by arousing the girls, by which time they'd allow you to fuck them and teach you new abilities. Do you see this underdeveloped person of legal age right here? A still-yet incomplete (newest version is 1% done) possible platformer/puzzle vore game.
The idea is to get as many of them as you can before time runs out.
Some of the girls can also be assimilated when you gain a level after engulfing them for another H-scene and a stat bonus.
Similar to The Legend of Zelda by dungeon and sword-play.