End: Twenty-Eight Years Old

Two-way secret love + running towards each other + the male and female protagonists are highly educated + childhood sweethearts + strong preference Under the locust tree, he promised that he would protect her like a brother for the rest of her life, but when she was most helpless and uncomfortable, there was a car accident on the way he came, and she thought he had broken the promise. Since then, she has suffered from a serious mental disorder, and he has been silently guarding her, guarding his weaknesses throughout his life. This time he came back to protect his little princess as a husband. He tried his best to protect his only rose, but in the end he was as helpless as quicksand...