On her tenth birthday, Lin Miaomiao successfully traveled to the future with the help of the Tooth Fairy to a place called Kaixin City.
Everything in the future city is strange. The most amazing thing is that "happiness" is used as the city's energy source;
So everyone in the future world does their best to be happy every day:
Tempting cakes, beautiful dresses, and exciting amusement parks are all free!
But gradually, Lin Miaomiao found that she couldn't be happy anymore——
What's going on? What happened to me?
So she embarked on a journey of "searching for emotions" with her new friends...
Purpose: Learn to accept emotions
