Japanese author Nenene Sumiregawa travels to Hong Kong for a book signing. When an attempt is made on her life, the three women previously hired to guide her around the city agree to act as her bodyguards.
After the Paper Sisters land in Japan (illegally), Nenene's editor hires the girls as her bodyguards, however, the sisters' odd behavior starts to annoy Nenene when they move in uninvited.
As the Paper Sisters execute their duties as Nenene's bodyguards, they accidentally discover Jinbocho and engage in a shopping spree. Meanwhile, Anita encounters a mysterious boy in an underground bookstore.
To make the sisters appear a little more normal, Anita is enrolled at Nishihama Junior High school. She has an eventful first day when a masked kid with a pistol enters the school library.