Su Yu and Gu Jinyu grew up together, from kindergarten, elementary school, to high school.
Su Yu didn't understand why Gu Jinyu liked to pull her pigtails since kindergarten.
Gu Jinyu also didn't understand why she liked to pull Su Yu's pigtails so much.
After high school, Su Yu met An Chen.
After getting along with each other in the second year of high school, An Chen gradually fell in love with this innocent girl.
Gu Jinyu panicked.
Later, through a series of circumstances, he learned that the one he liked was Su Yu. Unfortunately, the good times did not last long and Gu Jinyu had to leave the city.
Su Yu told him at the subway station that the person she had always liked was himself.
An Chen had no choice but to leave Su Yu after being admitted to college.