To commemorate a period of eternal youth and unrequited secret love.
Secret love is the most beautiful thing in youth. It can bring motivation and make you feel that your life has light, direction and a promising future.
The protagonist is BG, and the ending is BE. The supporting characters mainly have BL and HE endings.
The whole book uses the heroine's thoughts, behavior and growth as clues.
Concept: Secret love is a beautiful thing, and facing it correctly can make you become a better person.