While playing in his world Henbee fell down through a tunnel in a waterfall and woke up in the human world inside a closet of a kid named Maruko. The tunnel is closed, preventing him from returning to his home world.
Henbee possesses a magical parasol and with it he can fly and do magic, he also can speak to animals and fulfill everyone's dreams. Soon Henbee and Maruko become friends, and Henbee gets to help him out while staying at Maruko's house. Occasionally the tunnel back to his home world opens and animals and friends from his home world come through. Later when Henbee gets the chance to return to his home world, he hesitates due to his friendship with Maruko. Later in the series Henbee and Maruko travel to his home world with Henbee's magical Parasol.