One Week Friends

Isshûkan furenzu is a movie starring Haruna Kawaguchi, Kento Yamazaki, and Seika Furuhata. Yuki Hase befriended a lonely girl classmate when he notices that she's always alone. Upon knowing the girl, he found out a serious matter...
High school student Yuki Hase wants to become close with classmate Kaori Fujimiya who is alway by herself. Kaori Fujimiya refuses to become close with Yuki Hase, because she forgets her friends every new Monday. Even though Kaori tells Yuki why she doesn't want to become friends, Yuki still wants to become close to her.