Futaba (played by Kyoko Yoshine) and Wakaba (played by Reina Matsui) are a pair of sisters who depend on each other for life. They were raised by their mother Kaori (played by Ryoko Shinohara) since childhood. Because of the absence of their father, the burden of the family's life fell on Kaori. She was immersed in work and had no choice but to ignore the communication with her daughters. It can be said that Wakaba has always been taken care of and accompanied by Futaba, so Wakaba's personality is very strange, and the relationship between her and her mother is also particularly indifferent. Gradually, Kaori realized that she could no longer allow the parent-child relationship to continue to deteriorate like this, so she decided to use lunch boxes to convey her feelings for the children. Kaori always makes lunch boxes very cute, but Wakaba hates cute things the most. Kaori's lunch boxes made her laugh at her classmates at school. But as time went on, Wakaba gradually felt her mother's love from the lunch boxes.