The parents of the two children were close friends, and both families lived together as neighbors. The kids grew up side by side, going to kindergarten, elementary school, and middle school together. When they started high school, Zhang Yu's father was transferred by his company, and the two were forced apart. They promised to get into the same university.
Because Zhang Yu was born half an hour before Yang Xue, their families constantly reminded him to take good care of her. If Yang Xue liked eating something, he wasn't allowed to have any; if she didn't like something, he had to eat it. Zhang Yu looked after Yang Xue from childhood onward. They were childhood sweethearts, practically one family, and the adults were all happy to see them together.
One time, when they were playing together, a teacher saw them and called their parents in. The parents retorted so sharply that the teacher was left speechless. After that, they let the two do as they pleased.
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.