This was a terrific story. I liked Aphasiac!Harry and Insomniac!Snape both working to help each other with their problems. Snape was snarky yet compassionate. Harry was, as always, determined to save a life. Their slowly developing relationship played out plausibly. I enjoyed the alternating POV. It was fun to see what they're thinking as they interact.
"I love you," he repeated dazedly, let the words roll on his tongue, tasted them, and put his warm hand on Severus' arm.