The Marriage Certificate Is Missing

Shen Youyou and Sui Youyou. Using his health as a reason, Old Master Sui asked the two of them to get married. Unable to refuse him, they chose to marry. Sui Youyou later found someone she liked and wanted to marry, so she wanted to end her marriage of convenience with Shen Youyou. But she could only do that after Old Master Sui passed away. Then the marriage certificate he had kept went missing, so they had to apply for a replacement before they could divorce. And that required both of them to go together.

Theme: Don't do to others what you wouldn't want done to you. Don't impose on others what you want for yourself, either.