Yan Zichen dies saving Luo Yiying, the classmate he has secretly loved for ten years, then is reborn in his senior-year classroom. But she pulls him into a tight embrace, tears clouding her eyes. Using her knowledge of their rebirth, Luo Yiying relentlessly pursues him: their fingers intertwine beneath a shared umbrella on a rainy day, she sneaks the green peppers from his bowl during lunch on the rooftop, and she even declares in front of everyone that she plans to attend the same university as him. Under her fierce pursuit, Yan Zichen gradually falls for her, yet he remains completely baffled. During a school event, Luo Yiying is injured protecting him, making him realize just how deeply she cares. As they face family upheaval and academic pressure, they support each other and grow together. When Yan Zichen discovers that Luo Yiying is also investigating the truth behind the car accident in their previous life, he sees her struck by a truck on a stormy night as she tries to protect him. It turns out the crash was a carefully planned murder orchestrated by Luo Yiying’s stepmother. At the brink of death, Yan Zichen rushes to save her again, but Luo Yiying turns and shields him instead. Their fingers entwine in a pool of blood, and this time she tells him, “You have to see the morning light for me.”