When precision instruments encounter unmeasurable errors, the rational shell shatters in heavy rain.
"If I get better, will you still see me?"
"The end of the therapeutic relationship is a sign of success."
"So the answer is no."
"Doctor Lu, I cured you. You're welcome."
Who is the doctor and who is the patient? Who is observing and who is being observed? When "unobservable" emotions break through all professional boundaries, what is left is a rain that falls forever in the heart, and two souls who lived a brief, real and painful life in the rainstorm.