One day, Maki and Sayaka, mother and daughter, switch bodies due to an unexpected incident. With no way to return to the original state, the two decide to "play each other's roles"... The daughter playing the role of the mother realizes how difficult it is to be a mother at work, while the mother playing the role of the daughter feels nostalgic for the atmosphere at school. The two remain switched bodies, with the mother in the form of the daughter having a secret relationship with the daughter's boyfriend, and the daughter in the form of the mother engaging in an unexpected incestuous relationship with her father!?