Set in a future world. Japan has created a great medical technology that controls ethics, health, and social interaction to create a perfect world. Three young girls attempt to stand up to this by committing suicide, but it doesn't work. Years later, Tuan, one of the girls who attempted suicide must prevent a crisis that threatens this "perfect" world.
Makoto Nakazono is a high school student with a small dark secret. Since he was little, he has had the mysterious power to see "black entities" that steal souls. One day, he is suddenly interrogated by one of the "black entities," Akira Seno: "Will you get in our way?" But Makoto replies with an air of resignation, "There's nothing I can do anyway, so I won't." At that moment, Makoto didn't notice the threatening shadow approaching his childhood friend Hazuki...
