Suffering from bullying and neglect, Mashiro Fujisaki decides to end her own life. As she approaches a bridge railing, she is suddenly interrupted by a young man—claiming that someone has already booked her suicide site. Introducing himself as Haruka Kudou, he informs her that he is a "Jisatsuya," a person whose work encompasses all aspects of suicide. In an apology for stopping her attempt, he promises to assist Mashiro in committing suicide.