[She doesn't know that he knows]
Su Niannian was reborn and returned to his second year of high school, carrying with him the memory of his death from stomach cancer at the age of 35. She calculated that there were still seventeen years left. She took the initiative to approach, tested every step of the way, and wrote every heartbeat in her diary.
She didn't know that he had noticed that the edges of the note were frayed. He clutched the note and asked her, "Did you write it?" She turned and walked away, but he tucked it into his textbook and never threw it away.
[He doesn't know she knows]
Shen Sheng suffers from "selective aphasia" - the more he cares about people, the less he can name them. When he called her "Su Niannian", there were many strokes, but it sounded very nice when he pronounced it.
He didn't know that her diary wrote "Terminal gastric cancer in 2025". When he found out, he took all the stomach medicine she gave him in the stairwell of the high school and said to the empty corridor, "I'm here."
Later
He spent a week imitating her former guardianship, learning to "be seen" and "not to be afraid of her".
On her 35th birthday, he took her back to the water dispenser: "I'll give it to you for the rest of my life, no need to wait."
Concept: "Secret love is a matter of one person, rebirth is the salvation of two people."