Amid the cicadas' cries in a 2003 senior-year classroom, Gu Yan jolted awake from the agony of falling off a rooftop. Before him was not Lin Wan'er's bloodstained cotton dress, but her profile as she bent her head over a problem, sunlight falling on her hair just as it had in the old memories he'd hidden in his diary in his previous life.
In their past life, they had been each other's unspoken crushes, feelings hidden in the margins of their notebooks. He secretly slipped her room-temperature lychee soda to soothe her stomach; she kept the little sun he'd drawn crookedly on an egg white. But under the pressure of their families and Bai Xinxin's meddling, each mistakenly thought the other loved someone else. Only when Wei Yanzhi used the money for Lin Wan'er's mother's lifesaving treatment to force her into marriage, and she jumped from a building amid domestic abuse and the despair of losing her mother, did the words “I've loved you since high school” finally make Gu Yan take his own life in regret.
Given another chance, Gu Yan seizes control of his fate. He beats Wei Yanzhi to the punch and takes over his “chance encounter” with her. As he crouches by her desk to explain analytic geometry, his fingertips brush the back of her hand. He uses his knowledge of the future to earn his first fortune, quietly arranges an early screening for Lin's mother, and folds the medication list into a paper star. He carries her through flooded streets in a rainstorm, and the ring for his proposal along the cherry-blossom path already bears the character “Wan.”
“How do you know everything?” Lin Wan'er asks, eyes red.
He presses her hand against his heartbeat. “I traded a lifetime of regrets for the chance to keep you safe.”
Even with Wei Yanzhi still lurking and Bai Xinxin looking for a chance to sow discord, he will protect her, no matter what. From lychee soda in their senior year to standing side by side at Yenching University, this time he'll gather up every star they missed and weave them into the rest of her life.
It's very interesting, and the relationship between the male and female protagonists is very enviable, with a sense of youth and confusion.