27-year-old Sakumi Shimura lost the last 10 years of her memory from a car accident. Sakumi can only remember events up to when she was 17-years-old, but she accepts her fate and tries to stay positive. Nevertheless, Sakumi is bothered by the loss of her memory. She tries to remember with the help of Yoshihiko, who thinks of himself as her boyfriend and her friend from their high school days.

A story of 6 days with 5 people gathered around a small sparkling pool at Chiang Mai in Thailand. 4 years ago, Kyoko started to live in Thailand and has been working in a Guest house outside in Chiang Mai, leaving her mother and her daughter Sayo, in Japan. Just before the graduation of University, Sayo sets foot on Thailand to visit her mother with mixed feelings. However, emotional experiences with the people living there changes such feelings toward her mother.