一週間フレンズ。

Yuuki Hase, a high school boy, is determined to befriend his quiet classmate Kaori Fujimiya, who always sits alone. When he finally approaches her, Kaori reveals a heartbreaking secret: her memories of friends reset every Monday due to a past trauma, leaving her isolated. Undeterred, Yuuki decides to start anew each week, writing notes in her diary to help her remember their time together. As their bond deepens, Kaori begins to confront her past, and Yuuki learns the value of perseverance and connection. (Summary by Grok 2)