The so-called obsessive-compulsive disorder is a group of neuropsychiatric diseases with obsessive thoughts and compulsive behaviors as the main clinical manifestations. It is characterized by the coexistence of conscious compulsions and counter-compulsions, and some meaningless or even against one's will thoughts or impulses that repeatedly invade the patients' daily lives. It can also be understood as neurosis, but this symptom can be seen everywhere nowadays. People often don't care about obsessive-compulsive disorder, but if they are terminally ill, they may have the above-mentioned thoughts against their will and do stupid things involuntarily.
Su Mi is a typical patient with late-stage obsessive-compulsive disorder, and her clinical manifestation is that her thinking is uncontrollable and she forces herself to like Shen Shixuan. For Su Mi, Shen Shixuan is her habit.