Darzsa (MC) is being held by Josiah. Josiah has his arm around Darzsa, holding him close, as seen by how tight his fist is clenched. I wanted to give a protective vibe 
Darzsa is leaning against him, comfortable in Josiah’s arm, hence the smirk. And also because it lends to how cheeky he can be at times and has that “I know something you don’t” look. He’s a feisty little something
so I wanted to show how he’s secure in knowing Josiah is there for him. All circling back to the title
And the shattered glass goes with the mirror imagery present throughout the book. Art Deco background because it’s set in the 20s. Darzsa is in a dress because he’s gender non-conforming.
Did I explain too much
probably