Yan Zichen died saving Luo Yiying, her classmate whom she had a crush on for ten years. She was reborn in the senior high school classroom, only to be hugged tightly by her with hazy eyes. Luo Yiying used her reborn status to press forward step by step: interlocking their fingertips when sharing umbrellas on rainy days, secretly swapping green peppers in his bowl for lunch on the rooftop, and even announcing in public that they wanted to be admitted to the same university. Yan Zichen was gradually moved by her fierce attack, but she was also confused. During a campus event, Luo Yiying was injured while protecting Yan Zichen, making him realize her deep affection. After experiencing family changes and academic pressure, the two supported each other and grew together. Yan Zichen discovered that Luo Yiying was also investigating the truth about the car accident in her previous life. On a rainy night, she witnessed her being hit by a truck to protect herself. It turned out that the car accident was a murder carefully planned by Luo Yiying's stepmother. At the critical moment of life and death, Yan Zichen made another save but was protected by Luo Yiying. The two were intertwined in a pool of blood. This time it was her who said, "You have to watch the morning light for me."
