One day, a junior high school girl named Iko Kawai encounters an alien and is given a device called the 'Super Income,' which can grant any wish. She also learns about the existence of Martians plotting to invade Earth. To protect the planet, Iko joins the Earth Defense Force 'LTDT,' using the power of the Super Income.

Tora-san's family's neighbor, Akemi, who had been married in Marriage Counselor Tora-san (1984), runs away from her husband, who is only interested in work. Tora-san follows her to Shikinejima, and attempts to bring her back to her home. In doing so he encounters a school-reunion group who are traveling to meet their elementary school teacher, which is a reference to the film Twenty-Four Eyes by Keisuke Kinoshita. Tora-san joins them and falls in love with the teacher.