Oh, catnip! How do I love thee? Let me count the mice!
Nuku Nuku and her friends are back for more madcap adventures! For starters, Futaba has finally met the boy of her dreams, a handsome bookstore clerk. But the fevered thoughts in her head come from a concealed device in a book that's brainwashing Futaba to advertise Mishima products! Then Mr. Kyusaku dives to destroy Mishima's newly opened underwater hotel, only to get caught instead. To rescue him, Nuku Nuku must confront the Speedy Girls, a trio of pop idols with psychic abilities!
Worried about being on time, Nuku Nuku pedals so fast on the way to school that she and Ryunosuke travel back in time to when Kyusaku proposed marriage to Akiko. Events go terribly wrong, and Ryunosuke fears the Young President of Mishima will end up being his father! Finally, space mouse Michi-Michi wants to share one night of romance with Mr. Yamagata. But first she'll have to elude the mouse-hunting Nuku Nuku, as well as Mishima's alien retrieval squad!