When Lin Shen was thirteen, he felt that the happiest thing in his life was meeting Shen Lu.
When Lin Shen was eighteen years old, he felt that the thing he regretted most in his life was meeting Shen Lu.
They were originally two parallel lines, but they derailed when they were three years old and intersected unexpectedly.
The story must start from the beginning.
Purpose: Unrequited love never ends