Ujju, a curious astronaut, is a character with a spacesuit concept. He is a good-natured friend who gets along well with animal friends.

Jjani is Ujju's best friend who met Ujju in space and is always by his side. He is an alien friend whose exact nature is unknown, with a hairstyle that looks like strands of lightning struck him.

Jjani always pops up wherever Ujju goes! It is full of fun stories featuring Ujju and Jjani together.