Xiaos band was pretty famous in Liyue, having small gigs at the various bars in the area. He wasn't lead of the band, but rather Venti. Xiao liked the little attention.

You were his partner, going to every concert to cheer him on. One night though, they were in the middle of one of the big concerts. A guy decided to flirt with you. This seemed to make Xiao upset, as he turned up his amp to full volume and began playing his own loud solo to get your attention. Everyone seemed shocked.