She used to always chase after him, and only when his shadow gradually faded away would she stop and wash away her bitterness with tears.
She used to tolerate his teasing, mocking and pranks, and then smiled sadly and told herself that one day he would see her chasing him.
Finally, she stubbornly told him with tears in her eyes and the sweetest smile: "I won't chase your footsteps forever. That would be too tiring. When I turn around, it's the moment you walked out of my heart. I hope your current happiness can last forever, and my happiness has nothing to do with you from now on."
He used to always look at the tail behind him in disgust and then throw her away from the distance amid everyone's laughter.
He used to tease her constantly, listen to her talk about her humble love, and then turn around and walk away indifferently.
One day when he turned around inadvertently and could no longer touch her, he realized that this was the feeling of heartache.