One Week Friends (2014)
Original title: 一週間フレンズ。
One Week Friends is a 2014 Japanese-language animation series. It stars Yoshitaka Yamaya, Sora Amamiya and Yoshimasa Hosoya.
High school sophomore Yūki Hase noticed that Kaori Fujimiya, his classmate, was always alone. He tried to start a conversation with her but was turned down: "My memories of friendship can last only a week," she said. Despite of knowing this shocking truth, Yūki keeps trying to be Kaori's "new" friend every week.
Where to watch One Week Friends
Buy: Google Play Movies