Mari Asaki, known as Miwa's good neighbor, lives in Tokyo, where monsters and criminals gather. She is a magical girl who kills monsters and fights criminals in her spare time.
Three months ago, the only magical girl in Tokyo picked up a cat and spent a harmonious and happy time with the cat.
... Three months later, she began to keep a diary with a confused mood:
[Oops, oops, my cat seems to have become a cadre of the dark organization while I was away]
Then she saw the message sending page that she hadn't had time to close on her phone.
At the same time, with the same confused mood, and an unfamiliar sender, the cat's request for help seemed filled with self-doubt.
"Help, help, my master seems to be a magical girl!!"
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