Film commemorating the 30th anniversary of the Kaiketsu Zorori children's book series.
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Zorori makes an alarm clock machine to wake up in time for free donuts. But something strange happens when Zorori reminisces about his mother and sheds a tear. They see scenes flash by and the ZZ mark on his costume disappears! Zorori treasures it incredibly as it was added by his mother although he doesn't know its meaning.
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After crash landing in the street, Zorori, Ishishi, and Noshishi are saved by a fashion design student who they quickly discover is Zororene, Zorori's mother. The alarm clock machine had become a time machine and sent them to the past. She and later Zorondo Ron (Zorori's father), help the trio take back their time machine from the police and a kaijuu.
