Sakurako Ban (Mana Ashida) is a 12-years-old girl and the second child among 4 siblings. Since her mother passed away 6 months ago, she has taken care of house chores alone. Her father, Sota meets American woman Alice Shepherd (Charlotte Kate Fox) in the United States. Alice Shepherd aspires to become a photographer, but currently works part-time. Sota and Alice Shepherd decide to marry on on the spot. Sota takes Alice to Japan and introduces her to his children as their new mother. Sakurako Ban becomes angry and tries to kick her new mother out.