He is his therapist, using his lifelong knowledge to treat him, but slowly develops a feeling for him.
Duan Kechong accidentally discovered Xue Taoyang's miserable past and expressed sympathy for him. This sympathy slowly turned into love. Just as the relationship between the two was warming up, Duan Kechong learned from his family that his father's suicide was closely related to the Xue family.
The meeting between the two seems to be destined, but in the end it can only be an encounter.
Intention: None