Miki Narahashi

Everyone's favorite TV superhero Action Mask shows up in Kasukabe, and he's trying to get something from Shin-chan -- but what could it be?

Shin-chan is approached by his time-traveling future bride-to-be Tamiko, who asks him to help save his adult self from the ruler of Neo Tokio.

40-years ago, there was a prophecy claiming that in the year of “20” and “23”, two emitting lights would come to the Earth from outer space. And the dark light with strong power will bring out a huge disaster. In the summer of 2023, as predicted, two mysterious lights approach Japan and descend on Kasukabe. The white light hits Shin-chan, which makes him get a superpower. Meanwhile, a man called Mitsuru Hiriya, has been bathed in dark light and has acquired psychic powers begins to run amok. A man who wants the destruction of the world, Hiriya VS A happy-go-lucky kindergarten child, Shinnosuke. A superpower battle is going to begin!

Shin-chan must rescue the adults of Kasukabe when they mysteriously abandon their responsibilities to relive their youth at the new 20th-century expo.