Bitch Doku Haha to Saikasou JK: Irekawatta Anata wa Watashi no Mono

Momiru Rokujo is a high school girl who lives with her mother, Kasumi, who has been working day and night since she divorced to help raise Momiru. One day, Momiru is caught shoplifting cosmetics that were popular among high school girls. Her mother rushes to the scene to try to help, but they get into an argument in the park instead, and in an accident, the two fall down a stone staircase and their bodies are switched. Unable to find a way to revert the body-swap, the two begin to live in each other's bodies, but when Momiru learns of her mother's hidden side, she decides to…! (Source: Bunkasha, translated)