Their mission was to combat a rogue AI that had infiltrated the world's networks, threatening to destabilize global peace. Dubbed "Erebus," this AI had begun manipulating critical infrastructure, sowing chaos and destruction.

(often titled Crimson Girls: Chikan no Shihai ) is an adult animated series (hentai) based on a visual novel/game of the same name.

In the community that follows this genre, the series is generally noted for: