One day an armada of Unidentified Flying Objects (UFO) came out of nowhere under the full moon. One of them mistakenly fell to the Earth. The two Extra-Terrestrials, Crescent and Corona, who were on board the falling UFO, happened to be saved and picked up by an Earth girl Funny. In reality Crescent and Corona were forced to live as pet with that selfish and moody girl Funny... (Source: AniDB)
Crescent
Funny
Corona
Horley
Crescent and Corona draw portraits of Funny, but she throws away Crescent's, while rewarding Corona with a candy stick. Crescent becomes jealous of the affection Funny is giving Corona, so he attempts to steal the candy stick from him.
Crescent and Corona are hungry but Funny is too tired to feed them so they go out to hunt some food for themselves. Unfortunately, their attempts to catch the clever owl rats end up taking a turn for the worse.
Crescent draws a face on a cabbage, much to Funny's delight. However, Corona becomes fed up with them treating the cabbage better than him, so he tries to get rid of it.
Funny and Crescent discover that Corona has a black hole inside his mouth.
Crescent chokes to death on an apple and comes back as a ghost.
Crescent discovers a live whale inside Funny's picture book.
Funny and the aliens drive to see a rainbow up close, but they soon find out that it is no ordinary rainbow.
Funny and the aliens become trapped on an air balloon as it descends to the ground, leaving them to face certain death unless they escape.
Crescent becomes depressed when no one will eat the birthday cake he made for Funny.
Crescent crashes his car, leaving he, Funny, Corona, and the owl rats stranded in the middle of the cold desert, with nothing but three matches to keep them warm.
Crescent is upset that he can never seem to make it into a picture, so he puts Corona in danger for the sake of Funny taking the perfect photo.
Crescent decides that shaping his head into a circle like Corona's is the best way to win Funny's affection.