Ceres is a woman who brings a “curse” of death wherever she goes. It’s for this reason people call her a Shinigami or a “reaper”. She stays at an orphanage with a nun who decided to take her in even after all the incidents that occurred in the past. In a place called “Arpecheur” everyone is destined to die at 23 years old. Usually by 20 or 21 a person will start to feel the effects of a sort of respiratory disease that’ll kill them at 23. So in order to prolong people’s lives, research has been done to create clones known as “relivers” with people’s memories downloaded and implanted into them. Once a person has died, their memories are downloaded, a reliver is created, and they’re implanted into the new one. This way, people can live for another 23 years before doing the same process all over again.