Zhang Chengxu didn't know how powerful the feelings he developed when he was young were. However, the regret caused by his own indifference when he was young later became the crux of Zhang Chengxu's avoidance of someone, and was also the source of his frequent headaches.
Ye Yuning felt bitter about how deep the friendship was during the youth. But the promise someone made when she was young turned out to be empty talk, and the disappointment it brought her became the reason why Ye Yuning no longer wanted to see someone, and even regarded herself as someone's anti-fan.