I'm assuming you meant to type "xux" or possibly a different term, but I'll take a guess that you might be referring to "xu" or more commonly, "xx" or "x" relationships aren't standard terminology. However, I can make an educated guess.

That being said, let's discuss romantic storylines and relationship dynamics.

This emerging narrative domain is redefining intimacy, character development, and audience engagement across literature, digital media, and television. Understanding the Xxux Narrative Space

Let me re-read: "xxux relationships and romantic storylines". Perhaps it's "LGBTQ" but with a keyboard where L is replaced by X? No.