Two-and-a-half-year-old Su Niantang is a baby held in the palm of the world's hands. After being lost and found in an accident, she became the sweetheart of the six brothers of the Su family - the gentle eldest brother who would put candy in her pocket, the energetic second brother who could carry her all over the street, the skillful third brother who would tie her pigtails, the fourth brother who was an artist who could draw the cutest bear in the world, the fifth brother who was a foodie who secretly bought her ice cream, and the sixth brother who was always there to protect her.
Lu Yuchen, who was two years older than her, seemed cool and quiet, but was always the first to reach out when she fell, stood in front of her when she was bullied, and secretly stuffed his amulet under her pillow. This little bamboo horse's pocket always contains Tangtang's favorite strawberry-flavored gummy candies.
From stepping in puddles and getting his trousers wet, to learning to paint and paint all over his face; from being happy when he got the little red flower in kindergarten, to feeling aggrieved when he had nightmares late at night, Tangtang was pampered every day. But when a silver lock with vague small words engraved on it appears out of thin air, and a strange aunt holding old photos appears frequently, this sweet guardianship suddenly becomes foggy——
What kind of secret of life is hidden in Tangtang, who is held up in the clouds by her six brothers and little bamboo horse? And how many unspoken promises are hidden in that sentence "You are the sweetest princess"?
