A letter comes to the three Kohda sisters in Kamakura, bringing the news of their father's death. A father they hadn't seen since he divorced and left home 15 years ago. Despite feeling indifferent about their father, Yoshino, the middle of the three, and Chika, the youngest, go to Yamagata to attend his funeral on oldest sister Sachi's request. There, they meet Suzu, their young and reliable half sister.

(Source: MU)