A British comic fantasy containing humour and pop-culture references. Episodes often featured elaborate musical numbers in different genres, such as electro, heavy metal, funk, and rap. The show has been known for popularising a style called "crimping"; short acappella songs which are present throughout all three series.

Naota Nandaba is an ordinary sixth grader living in a city where nothing amazing ever seems to happen. After his brother Tasuku leaves town to play baseball in America, Naota takes it upon himself to look after everything Tasuku left behind—from his top bunk bed to his ex-girlfriend Mamimi Samejima, who hasn't stopped clinging to Naota since Tasuku left.