When the Book of Prophecy goes out of control, Chapo finds herself in Ikebukuro! How can she survive in the shocking otherworld of contemporary Japan...except by getting to work! With the help of a lovestruck otaku, Chapo goes viral as a real-life service-providing "cat girl," while back home, Yuzuki and the crew try to find a way to rescue her. But to get back to Earth and bring Chapo home, Yuzuki is going to have to make a deal with a Dark Lord. Dare she risk everything for her new friends?