Xu Jingnian fell in love with the wrong person, and this mistake can never be undone.
Xu Jingnian loves Ye Jin, but she loves him.
He never thought that what he thought was the most perfect encounter would be because of Ye Jin's agreement with another man.
Be/Xu Jingnian's perspective/Ye Jin has a boyfriend, but Xu Jingnian didn't know it at first/After learning that Ye Jin had a boyfriend, Xu Jingnian didn't do any behavior towards Ye Jin that went beyond the boundaries of classmates
Purpose: If you have a secret love, be prepared to fall out of love