Ayase plays the eldest daughter Sachi who is a nurse and has an affair with a married doctor. Nagasawa plays the second daughter Yoshino, an OL who is particular about money as she works in a trust bank but has bad luck with men, likes men who are younger than her and behaves badly when she's drunk. As for Kaho, she plays the third daughter Chika who is working at a sports equipment shop and suddenly changes her long hairstyle to an afro on the day of their father's funeral. The three sisters had been living on their own in Kamakura ever since their father who had married into their mother's family eloped with Suzu's mother. However, when their father passes away, Sachi makes the decision to adopt Suzu who is only 13 years old and the three sisters must adapt to living with their half-sister all of a sudden. The movie will describe the first year of when the four sisters first meet and filming will be done primarily in Kamakura.
The four actresses first met in late March for a pre-production meeting and filming will begin at the end of July.
Source: Sponichi / Wikipedia