To control the heart and mind of people, 23 orphans underwent human experiments for a drug called "Grim Reaper." Now, those guinea pigs are scattered throughout the underground world. Issei, who is fragmented by love, carries out his mission to save them. Ei, who clings to his love for Issei, tries to save them. Kirio, distorted by her love for Issei, abuses them. And the three of them have little time left to live. A sensual psycho-action story about three people who insanely refuse to give up on their love and mission!