When Nobita feels like diving in his hometown, Doraemon uses a Underwater Pump Simulator to pump all the water out of Tokyo, causing the entire city to go underwater. That night, Doraemon and Nobita use a Diving Mask Simulator to dive underwater. Later on, lots of fish, and a shark attack Doraemon and Nobita. So, Doraemon puts a stop on the Underwater Pump Simulator, but there is a girl named Sophia, lying down on the bushes in his neighborhood.

Magic Tree House is a 2011 Japanese anime drama film based on the American children fantasy series of the same name. The film is directed by Hiroshi Nishikiori, and the film’s screenplay was adapted from the Japanese version of the novel series Magic Tree House by Ichiro Okouchi. The film stars actress Keiko Kitagawa as Jack, and also stars child actress Mana Ashida as Annie. Magic Tree House debuted at the 24th Tokyo International Film Festival on 23 October 2011. It was subsequently released in Japanese cinemas on 7 January 2012.