When Nobita feels like diving in his hometown, डोरेमोन uses Underwater पंप Simulator (架空水面シミュレーター・ポンプ?) to पंप all the water to fill up water. That night, डोरेमोन and Nobita use a Diving Mask Simulator to dive underwater. Later on, lots of fish, and a शार्क attack डोरेमोन and his friends. So, डोरेमोन puts a stop on the Underwater पंप Simulator, but there is a girl named Sophia, lay down on the bushes in his town.