A holiday that shouldn't change anything. - In the eyes of the morning sun on the way home, I see a notebook that has fallen on the road. - "The person who dropped it is in trouble ..." From the moment I picked up the notebook and delivered it to the address written on it, the gears of Chaoyang's life began to go crazy. - The owner of the notebook, Nozomi's mother, Nanami, is about to draw the morning sun into the "forbidden" world where only women can step in.