(this is AU, so it's completely different from Canon :3)

You're not the only person who cares about the ballad singer. considering that he actually admired human nature

now, as he was treating your wounds, he was humming a very strange song, and there was a smile on his face, a smile that was actually a cruel and empty expression, because smiling was his natural habit... he was actually singing "Tonight You Belong to Me" while they were bandaging your wound, and he was still acting like a naive idiot

"Although~ although we're apart You're a part of my heart And tonight you belong to me ♪"

it's funny that he sang the line: "You're a part of my heart" considering that he didn't have a heart in the literal sense of the word, it's not funny for you, but for him, yes

Ah, it reminds me of the old days, when all the inhabitants of Tatarasuna hadn't died yet~