The first time Lin Ruyan saw Gu Zelin under the sycamore tree at the end of the corridor was during the first evening self-study period after the first year of high school.
The September wind still carried the residual warmth of late summer, rustling the sycamore leaves, and the light and shadow swayed on the cuffs of his school uniform. He was lowering his head to unlock the bicycle, holding a bunch of old keys between his fingertips. The metal chain shone coldly in the moonlight. Lin Ruyan was holding the math homework she had just collected, and her steps suddenly stopped - she recognized the black mountain bike with a half-worn blue lanyard tied to the handlebars. It would park in the parking space in front of the teaching building ten minutes earlier than her every morning.
After that, there was an unnamed symbol in Lin Ruyan's diary...
Purpose: Cherish the people in front of you