More than twenty years ago, an evil summoner committed "Great Summon". One third of human beings were killed, and devils and monsters invaded the Earth. One day, a painter, Tamura Fukutaro, moves into an apartment house called "Ashiaraiyashiki" and gets involved in the troubles of his non-human neighbors. It's the beginning of a severe battle among gods, devils and the ruler "The Central".

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.

Jim is working as an innkeeper, together with his friend, the mouse Gran. One day, a mysterious man visits the inn, leaving a map behind. The map shows an island with a treasure. So the duo sets off in their own little boat, trying to fulfil their dreams and leaving the inn far behind. But it seems more people knows of the map, as they cross paths with Captain Silver and his band of wild pirates. Jim, Gran and their new friend Kathy tries to beat them in the treasure hunt that ensues.