Kaori Fujimiya has no companions because all of her joyful recollections are erased every Monday. Despite this, Yuuki Hase endeavors to establish a bond with her on a weekly basis, hoping that someday she will address him as a confidant.
Isshuukan Friends. has been published in English as One Week Friends by Yen Press since December 19, 2017. It has been licensed in Spanish by both Panini Manga México and Ivrea Spain.