Toriatsukaichuui!? Koukyuu Melon Daibakuhatsu

Since Midori must not realize that Arale is a robot, Senbei quickly screws Arale's head onto Obotchaman's body. However, Arale now has a puller, and Senbei no longer has Arale's blueprints. So he wants to travel three days into the past to take a photo of her.