Narumi Shimaoka.She is currently Assistant Special Investigator, Organized Crime Investigation Division II, National Security Bureau of Investigation.After a few more months of training, she joins the ranks of investigators.Her senpai, Saeko Mishima, whom Narumi respected from the bottom of her heart, went missing during her infiltration, and she couldn't help but join her search team...The most cruel iron shackles pleasure torture hell in the world awaited.The core of her sleeping woman explodes.