A certain gentleman stood on the steps, approached Cheng Su's ear and said: "You have three choices. First, you marry me; second, I marry you; third, we get married."
Cheng Su: "Teacher, are you proposing?"
Mr. XX: "Then do you agree?"
Cheng Su: "Yes"
Before, he was her teacher; after that, she was his lover.
This is a story about the love between a teacher and a student, and also a warm love story.