The story revolves around Reiji Tachibana, a relatively normal high school freshman that lives with his overprotective sister, Ayake Tachibana. That day, Reiji hears a rumor about a series of suicides/murders revolving around people who come across random fashion accessories. One day, he happened upon a bracelet, and moments later, he was killed by a thief that he confronted. Through the powers of the bracelet, he was able to stay alive based on his life number that is tattooed on his chest. These reborn people are known as takers. The number correlates with the number of days he can stay alive. In order to prevent the number from reaching 0, a taker can choose to take the life number of another taker or fight monstrous beings known as angels. Will Reiji be able to survive without sacrificing his moral principles, or will he learn the true meaning of human nature.