On a drizzling afternoon, Su Zaizai, a cute and cheerful 16-year-old girl, unexpectedly meets Zhang Lurang, the top student in the same grade school.This unexpected encounter not only left a deep mark on their youth, but also opened a new chapter in their emotional world.

Su Zaizai is a girl full of energy and warmth. Her smile can always dispel the gloom around her.As for Zhang Lurang, as the school's top student, he always felt unattainable. He carefully constructed his own defenses and kept a certain distance from the outside world.However, in the face of Su Zaizai's enthusiasm and sincerity, Zhang Lurang's defense gradually collapsed, and he began to be infected by the girl's warmth.

As time goes by, the relationship between Su Zaizai and Zhang Lurang becomes deeper and deeper.They not only support each other academically, but also care about each other in life.And their friends Gu Ran and Jiang Jia have become enemies who have never known each other because of various misunderstandings and collisions.Although their friendship is full of twists and turns, it is these twists and turns that make their relationship stronger.

The life of this five-person group becomes more colorful when the troubled boy Guan Fang joins their circle.Although Guan Fang was rebellious, he gradually became mature under the influence of Su Zaizai and others.They spent many unforgettable times together, whether it was laughter or tears, they became the most precious memories of their youth.