The kunoichi Asagi, an Anti-Demon Ninja tasked with eradicating evil, goes missing during an infiltration mission. To locate her, Asagi and Sakura head to an artificial island floating in Tokyo Bay. Once a half-finished development project, the island has been abandoned and has since become a lawless zone overrun by demons, criminals, and ruled by decadence and indulgence. Asagi must overcome the dangers here and faces new trials. A variety of torments await—gang rape, big tit torture, squirt orgasm, succubus tentacle gang rape, beastiality, nipple tentacle rape, sister slave rape oath—and a depraved trap set to destroy the kunoichi. Powerless after being physically altered, she is subjected to extreme torture until she chooses death herself. How Asagi endures and overcomes these trials unfolds in a thrilling, action-packed narrative!