The film is adapted from the novel of the same name by the famous contemporary Japanese writer Maiko Seo. The novel won the "Honoya Award" in 2019 and swept major bookstores in Japan, becoming the last gentle care of the Heisei era. The adapted film will be played by Satomi Ishihara as the mother in the novel, and Mei Nagano as her daughter (12 years younger than Satomi Ishihara). The film is scheduled to be released in 2021. The film tells a story about family and love. 17-year-old Yuko Morimiya (Mei Nagano) is a senior high school student. Her mother died when Yuko was young. After that, Yuko was constantly fostered. She had 3 fathers and 2 mothers (Satomi Ishihara played her stepmother), experienced 7 changes in family form, and even changed her name 4 times. At the same time, she also experienced the pain of growing up from an ignorant teenager to an independent woman. Passing the baton of love between relatives without blood ties gave her the best love. This story presents a more common situation of non-blood-related families than "Shoplifters" and "Like Father, Like Son". It interweaves the touching bonds of kinship, friendship and love, and makes people think about the meaning of family: even without blood ties, we can still be very happy.