After nearly a thousand years of getting along, and ten years of deep missing, if he hasn't understood his feelings, he would be really a fool. The Dark Lord chuckled.
So, without the professor even knowing it, he was booked by someone.
The agreement between life and death is broad, and it is said by Zicheng. Hold your hand and grow old together. Don't lose, don't forget, never leave.
PS: The professor in this article has not read the original work or movie, but has only touched upon some fan fiction, so some of the nerdy ideas in the article are normal... Right?