Forty-five degrees behind and to the left is a position where you can keep track of someone's changing emotions without being discovered, silently watching over them.
Years later, they finally realized that all the misunderstandings had been part of someone's carefully plotted scheme.
Li Shien had known since childhood that Zhou Zhiyu was trouble, and her life had indeed become much harder because of him, even though she knew he had done nothing wrong. It took her a long time to realize how he felt, and her own heart slowly changed for him, too. But because of a misunderstanding, she thought he was tired. Wanting him to become a better version of himself, she decided to let him go.
Zhou Zhiyu had been told since childhood to look after the girl next door. Gradually, he realized that his feelings had changed. He thought he shouldn't force his love on her, so he quietly put those feelings away and watched over her. Later, when he realized she might like him, he made up his mind to confess. But a misunderstanding led him to say something in anger. Before he could cool down and go find her, she had already disappeared from his life.
When they met again, Zhou Zhiyu felt they'd already wasted too much time, so he began his relentless pursuit to win her back.
Top student × school heartthrob
University professor (owner of a small entertainment company) × AI company CEO (reclusive composer Yan Si)
Theme: Watch over each other and become the one and only for each other.