Aria and the Secret of the Labyrinth follow the crazy adventure of a young Japanese maid whose life is turned upside down. While cleaning a mansion's basement, she finds a secret door where she hopes to come across a big treasure. But instead, it’s a portal to a demon dungeon where her most scary nightmares come true. A series of tentacle rapes and femdom lesbian encounters will turn her into an obedient sex slave. Will you manage to help her find the way back home, or will she be trapped in this alternate world of rape and humiliation?