Two girls in the same class with very different identities and status were hit by a mysterious magnetic field on a stormy night, and their souls exchanged. The two agreed to "live their own lives during the day and exchange diaries in the old library late at night", working together to maintain the surface calm. In the process, they have to help each other cope with their respective social circles and interpersonal relationships, and gradually discover that there is another unknown side of each other's lives, and this exchange seems to be a carefully designed "experiment."
