An action comedy including parodies of tokusatsu monster/hero genre, such as "Godzilla" and "Ultraman." A time-space conditioner from the future, Miraiman, suddenly appears before the Nohara family, and he requests the family to fight against giant monsters who appear from time-space distortion one after another, in order to save the world from destruction. Every time monsters appear, Shinnosuke's parents, father Hiroshi and mother Misae go to the world three minute later, transform themselves into righteous heroes and defeat them within the time limit of three minutes. Hiroshi and Misae become wrapped up in getting rid of monsters, and Misae stops doing the housework. Then, a strong monster appears, and he cannot be defeated within three minutes. Shinnosuke rises up against the monster.

A slapstick comedy on a bomb uproar, and a touching story about the ties between the Nohara Family and their dog Shiro. A film in the musical style including the scenes with inserted songs. When the Nohara Family enjoy a trip to Okinawa, a strange object like a flying saucer becomes stuck with Shiro's bottom. That is a special bomb dropped by "The Only Buttocks Aliens," and it has the power to destroy the whole earth. The space monitoring center "UNTI" (Unidentified Nature Team Inspection) begins to pick up the bomb, but a female terrorist group "Hinageshi Opera Company" tries to get the bomb and disturbs UNTI's work.

Master butt-swordsman Hiroshinosuke Nohara (Lone Wolf) travels with his family seeking employment. The family encounters a mysterious girl Hazumi and a wild dog Shiro, and decides to travel together. The group is attacked by various assassins, eventually their lives are threatened by the butt-swordsmen's enemy, the armpit-swordsmen of the Demon Bull Clan. Who will win: butts or armpits? Against an array of idiosyncratic enemies, Hiroshinosuke Nohara and his son Shinnosuke have the chance to display their swashbuckling skills.

Master butt-swordsman Hiroshinosuke Nohara (Lone Wolf) travels with his family seeking employment. The family encounters a mysterious girl Hazumi and a wild dog Shiro, and decides to travel together. The group is attacked by various assassins, eventually their lives are threatened by the butt-swordsmen's enemy, the armpit-swordsmen of the Demon Bull Clan. Who will win: butts or armpits? Against an array of idiosyncratic enemies, Hiroshinosuke Nohara and his son Shinnosuke have the chance to display their swashbuckling skills.