In a town where humans and youkai coexist without the humans noticing, the protagonist works an unusual job: she is a shinigami employed by a company called Yomi, which handles human deaths. Her nightly work involves taking the lives assigned to her. One day a young man named Fujishiro Takumi appears — alive — despite being on her completed list. She begins searching for an explanation. Other shinigami groups start cooperating with the investigation, and her blood-soaked daily life starts shifting into something she did not expect.