Naedoko Demon's Ground: Maternity Princess of the Abyss follows a group of brave female adventurers who stumble upon a sinister conspiracy hidden deep within an ancient dungeon. After Lu Luu goes missing while heading toward the royal capital, her cousin Eliza, along with her wolf companions and allies, sets out on a rescue mission into the Yamana Deep Cavern. There, they encounter Jard, a fellow adventurer already restrained and brutally violated by grotesque monsters.

Horrified, they learn the truth: the Acklem Knights have been abducting female adventurers and forcing them into monstrous breeding rituals, using their bodies as "naedoko" (seedbeds) to incubate demon offspring through repeated tentacle rape, egg-laying, and impregnation. The knights treat these women as mere vessels for producing more horrific creatures.

As Eliza and her friends become the next targets, they face relentless sexual torment, monstrous violation, and the risk of becoming pregnant with demonic spawn. This uncensored hentai OVA delivers intense tentacle action, bondage, oviposition, monster sex, and mind-breaking pleasure in a dark, erotic dungeon setting. Perfect for fans of extreme fantasy hentai with breeding and corruption themes.

Based on the erotic doujin game by Tsukinomizu Project (月の水企画).