How Come My Girl Band is Magical Girls?

[Girls' Band: Dog Seller/Hen Card/K-ON/Loneliness/GBC+Magical Girls+Other Anime Content] ... Every day, Yuzuru Dazai wakes up and switches bodies with Shoko Toyokawa. A collapsed band, an alcoholic father, endless work, a broken home. Damn it! Shoko Toyokawa, what have you done? Shoko Toyokawa is incompetent, I must leave! First, have a serious discussion with the hard-working band members. Then, get close to the adorable, autistic Mu. Send the alcoholic father, who's suspected of being on the verge of death, to the hospital. Finally, send the damned Shoko Toyokawa to the countryside for a rigorous rehabilitation. Wow! Everyone has a bright future! ... Why is the Girls' Band so heavy and twisted? Is this a moral decline or a lack of humanity? The truth is... "Sign a contract with me and become a magical girl!" The girls can become magical girls through the music of the contract! ... PS: The girls in the band are actually magical girls, so all the abstract plot points make sense.