My Sister's Teacher Is My Crush

Illustrator Gu Xiaoyue unexpectedly reunites with Huo Chen, a man missing for seven years, after her sister Gu Xiaoxing causes trouble at school. Seven years ago, Gu Xiaoyue confessed but failed, and her cousin Xu Xingyao, holding the rabbit doll Gu Xiaoyue gave Huo Chen, created a misunderstanding that led to them blocking each other. Now, Huo Chen is Xiaoxing's homeroom teacher and actually a partner at an investment firm; he had fallen for Xiaoyue back then, hiding a love letter inside the moon lamp he gave her, but thought it was rejected after being blocked. Upon their reunion, the two frequently meet and their feelings reignite, though Xiaoyue dares not reveal them due to the misunderstanding. Xu Xingyao interferes, while Xiaoxing is bought by Huo Chen to become a double-sided helper. Finally, the misunderstanding is cleared, the truth about the rabbit doll emerges, the love letter delayed for seven years is found, and the couple finally gets together.