Our Little Sister | Japanese Movie 2015

Synopsis: When the Koda sisters were young, their parents divorced and they were abandoned. Yoshino is aware that her father's widow, Yoko, is not Suzu's real mother and finds her to be unfit as a guardian. Concerned for Suzu's well-being, Sachi attends the funeral and invites Suzu to live with them, Suzu gladly accepts. Sachi asks her sisters, Yoshino and Chika, to attend the funeral where they meet 13-year-old Asano Suzu, their half-sister.