One day, mother and daughter Maki Hojo and Ayaka Tomoda become caught up in a strange incident. By chance, their bodies are swapped, and with no way to return to normal, they decide to live each other's lives. The mother, now in her daughter's body, experiences for the first time the pressures and stresses of work, while the daughter, in her mother's body, attends school and nostalgically recalls her past days. In this swapped state, the mother in her daughter's body struggles with her boyfriend, while the daughter in her mother's body is shocked by her relationship with her father. Amid this mysterious situation, the bond between the two grows ever deeper.