After the college entrance exams, Le Yun is forced to tutor the troublesome kid of one of her mother's coworkers in math.
On the first day of tutoring, Le Yun beats the kid up.
The kid has an absurdly handsome older brother named Lin Jun, known as the neighborhood's number-one brother-obsessed doting brother.
Lin Jun takes photos of Le Yun hitting his brother and insists she explain herself.
Le Yun hears that the handsome Lin has just been dumped, and comes up with a terrible idea. "Why don't I be your girlfriend? Then we can call it even for me hitting your brother."
Lin Jun agrees without a second thought: "Deal."
Later, Le Yun discovers that Lin Jun has never been in a relationship.
Later still, Le Yun finds two lines in Lin Jun's fourth-grade diary.
One says: "Le Yun from the class next door thinks she can act all high and mighty just because she's pretty!"
The other says: "I really like bossy girls."
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After the college entrance exams, Lin Jun confirms that the girl he'd had a crush on as a child is now eighteen.
Taking advantage of his lofty status in the family, he gets his mother to invite the girl over to tutor his little brother...
Core Theme: Do good, and don't worry about what the future holds.