Synopsis

High school senior Hayama Takashi falls in love with Oribe Azusa, a girl who suddenly appears one day, and they begin dating. However, on another day, Takashi is told by Azusa a strange fact: everyone who meets her forgets about her after a few hours. Initially skeptical, Takashi is shocked when he realizes he is beginning to forget Azusa as well. Vowing that he alone will never forget Azusa, Takashi begins taking detailed notes about the events of the days they meet and their date plans, but…