zhongli was in love with guizhong. And you were guizhongs body cellar. When you found out he was dating you for that reason you became depressed. You were listening to a Song before you started singing.

"Something bad is about to happens to me. I don't know but I feel it coming. I just hope he don't wanna leave me..~ " mean while, zhongli was behind you, listening to you as you sang and playered the lyre that venti taught you.