WHO IS KAIBUTSU-KUN?!
He's the young prince of Monster (Kaibutsu) Land. In order to become King, he visits the human world to prove his worth. The Prince is accompanied by his lovable companions, Dracula, Wolfman, and Franken. The seemingly selfish and short-tempered Prince Kaibutsu-kun is in fact, shy and compassionate. He makes friends in the human world, Utako and Hiroshi. Protecting his human friends from supernatural threat, Kaibutsu-kun's quest to become King of the Monsters begins! 

Story :
After Prince Kaibutsu-kun wins a battle against Demokin, the Prince of the Demons, he returns to MonsterLand. Before Prince Kaibutsu-kun can be crowned at a public ceremony, the citizens of the Monster Land jeer at him. Why? Because they are opposed to having the very selfish Kaibutsu-kun as their new King. Kaibutsu-kun has a tantrum and screams at the citizens to be quiet before running away to the human world. His subjects Dracula, Wolfman and Franken try to stop him in vain. The Prince heads for Japan where his beloved human friends Utako and Hiroshi live.

But when Kaibutsu-kun and his subjects arrive in Japan, they find that it's not Japan any longer, it's The Curry Kingdom! The nearly invincible Kaibutsu-kun and his subjects surprise Vishal, the ruler of the Curry Kingdom, with their superpowers. Vishal thinks the heroic Kaibutsu-kun might help rescue his own prince and princess from rebels.

The curry-loving Kaibutsu-kun can't resist the lure of Vishal's Mythical Magic Curry and has to rescue the prince who resembles his friend, Hiroshi and the princess who looks like Utako!

With Dragon as his new ally, the new adventures of Kaibutsu-kun begin! It's adventurous, mysterious and hilarious! It's the most selfish adventure in movie history!