The film follows , a spoiled and sensitive four-year-old boy whose world is turned upside down when his parents bring home a new baby sister named Mirai . Consumed by jealousy over the loss of his parents' attention, Kun begins to act out and retreat into a magical garden in his family's courtyard.
: He encounters his mother when she was a messy, rebellious little girl, helping him see her as a person rather than just an authority figure. Mirai no Mirai (Dub)
The English-language version was produced by and features a cast of well-known actors: Kun : Jaden Waldman Mirai (Teenager) : Victoria Grace The Father : John Cho The Mother : Rebecca Hall The Great-Grandfather : Daniel Dae Kim The film follows , a spoiled and sensitive
This garden serves as a gateway through time, allowing Kun to meet family members at different stages of their lives: The English-language version was produced by and features
Through these fantastical encounters, Kun learns that his family members were all once children with their own struggles. He eventually finds himself in a surreal "Future Station," where he must claim his identity to find his way back home. He chooses to embrace his sister, finally accepting his place in the family tree. The film concludes with Kun showing newfound maturity and a genuine bond with the infant Mirai.