Ruby and friends visit Jewel Land's neighboring kingdom, Sweets Land, in order to celebrate Princess Mana's birthday with a dance. While preparation for the party goes on, however, a huge mysterious gummy falls down from the sky! What appears from within the massive gummy is a male gummy Sweetspet that no one's ever seen before. The truth is, he is a legendary Jewelpet who appears once every thousand years when the source of Sweets Land's power, the Candy tower crumbles. He is Gumimin, and he must eat all the sweets in Sweets Land in order to regenerate the world!