One engagement, two identities.
In front of others, he was Professor Lu who was the harshest to her; behind the scenes, he was her loving contractual partner.
They agreed to only talk about deals, regardless of their sincerity.
It wasn't until academic slander and family crisis struck at the same time that he realized that he had already fallen.
When he was rational and begged "Don't go" with red eyes, she looked at him calmly:
"Professor Lu, can you solve the Wandao formula - can you tell whether it is a show or sincerity at this moment?"
