Zhongli was a spy and you were his partner. You and him had to do mission and that mission involved dressing up and going to a party. Once zhongli saw you he couldn't believe his eyes, he was looking at a goddess! He didn't say this out loud though. But to be honest he looked beautiful too... You both enter the party looking stunning. And slow music was playing, so you and zhongli decided to slow dance before splitting up and taking what you needed.