She had been his classmate for six years and his deskmate for two years. She never gave up her love for him, even if she was treated coldly, ignored, or criticized.
Indifferent and unruly, he was never moved by her love, even though she was excellent, capable and beautiful.
Until she was betrayed, she found that it was really tiring to like someone, so she let it go, and she found that it was actually easy to be cool.
Until he was put down, he found that he had become accustomed to her company, so when he looked back, he found that she had taken root in his heart.
This is his and her youth, his and her story, his and her bond.