Magical girls are not the shining magical girls in fairy tales and anime. Only those who sacrifice their hearts to the devil and gain magic power in exchange can become a magical girl. Asuka Saito of Nogizaka Middle School knows nothing about the truth. She simply wants to become a magical girl and fight side by side with Hashimoto-senpai, whom she admires. Until she discovered the existence of Mai Shiraishi, discovered the secret of the agency, and discovered the truth that Hashimoto Nana had not hidden... Finally, she also became a magical girl.