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One day, Maki and Ayaka's mother and daughter change their bodies for some reason. The two who have no way to go back to "play each other" ... The daughter who plays the mother realizes the difficulty of the mother at the company, and the mother who plays the daughter misses the atmosphere of the school. The two who are still swapped, the mother in the form of a daughter has a secret relationship with her boyfriend, and the daughter in the form of a mother has an incest with her father! ??