Born on February 29, he decides to seize the once-every-four-years chance to make a wish to an angel and become a successful, lucky bear. But the angel tells Backkom he must pass three trials to meet the Angel King and have his wish granted. Didi, born on the same day as Backkom, has always enjoyed his parents' sole affection and never learned to care for others; with a baby brother now born at home and soon to be an older brother, he begins to feel left out. To win back his parents' full love and care, he too sets off on the trial journey. Along the way, the relationship between the two begins to change subtly... Finally, they arrive together at the Angel Kingdom's pier, only to be told that only one may cross to the Angel Kingdom on the far shore. Who met the Angel King? Come to the venue to unveil the mystery!