A bratty kid saves an alien from being entrapped in a pot for skipping Monster school on the condition that he does his homework for him.
An astronaut, thought to be dead, comes back to Earth from the deadly Planet Atlanta. However, he is secretly an Alien Atlanta. Leo knows he must defeat it but the alien's lover would be devastated. Can he do it?
Kaoru Umeda is kidnapped by Specter under the disguise of her mum. When Gen tries to save Kaoru, she sends Alien Mazaras to Earth. He must defeat them both!
The evil Alien Barabou disguises himself as Leo's younger brother to retrieve the Ultra Key, meaning the Land of Light and Earth will collide.
