Lu Jiahe liked to tease Xu Xinyi since he was a child. When he was a child, he often robbed Xu Xinyi's milk bottle. When he saw her crying or adults want to find out, he quickly returned it to her, and then tried his best to make her happy.

Lu Jiahe is five years old and Xu Xinyi is three years old.

Jian'an and others have arranged to go to the seaside for a holiday. The adults are drinking drinks and chatting in the distance, while a few children are gathering to play in the sand.

Xu Xinyi played very seriously. He piled up a castle little by little....