A group of happy little animals live on Blue Star, but even a wonderful life can bring troubles and worries, big and small.
So, on Worry-Free Island at the southernmost point of Blue Star, a group of knowledgeable and kindhearted animals founded a world-famous school called the Worry-Free Academy.
After graduation, the students of Worry-Free Academy become worry counselors, helping kind animals around the world solve their problems.
But becoming a worry counselor isn't easy. To pass the graduation test, students must collect the seals of all nine teachers.
Xinxin the black cat has failed the test three years in a row. The closest she ever came to success was collecting eight seals.
Today, Xinxin is facing her fourth graduation test at Worry-Free Academy.
She is afraid of the graduation exam, and even more afraid of failing again.
But when her good friend, Baiyun the rabbit, asks for her help, Xinxin finally decides to take part.
During this special exam, Xinxin gradually finds her way back to the person she used to be...
Theme: Never forget who you were at the beginning
