Mint, the princess of the enchanted world of dreams and magic, is faced with a dire situation as the surroundings of her realm deteriorate due to the loss of faith in dreams among humans. As the environment dwindles, Mint decides to embark on a journey to the human world, determined to protect their hopes and prove her ability to become a wise leader. After celebrating her 12th birthday with her parents, the King and Queen, she agrees to reside with her aunt, Herb, who runs a cheerful gift shop called "Happiness Shop".