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.

• Yoshitaka Yamaya
• Sora Amamiya
• Yoshimasa Hosoya
• Rumi Okubo
• Shintaro Asanuma
• Mai Nakahara
• Junji Majima