High schooler Yuki Hase, portrayed by Kento Yamazaki, is eager to befriend his solitary classmate, Kaori Fujimiya, played by Haruna Kawaguchi. However, Kaori is hesitant to form a bond with Yuki because she loses all memories of her friends at the start of each week. Despite Kaori’s explanation for her reluctance, Yuki remains determined to connect with her.