Dante's poem is about missing a person who once shared the speaker's bed, and how the nights have changed since that person left. The speaker remembers small, intimate details: a tired, croaky voice, a slurred accent, breathing that sounds like wind chimes early on a Saturday morning. Sleeping beside this person felt like a continuous dream.
The mood is quiet, tender and lonely. The speaker says the nights felt "colorless," like a black and white movie, until the other person's voice checked that they were still there. That suggests the voice and the care in it brought the color. Now the speaker lies awake, repeating "wanting" again and again, which makes the longing feel stuck on a loop. The last line is the most touching: after everything, what the speaker wishes for most is something ordinary, the hoarse sound of that first breath in the morning. Grief here lives in small, everyday things.