Reverb
The sound shivers up his feet and through his legs. He thinks it'll end with his head, but it steals away to his fingertips. His hands shake from the sound.
The Princess is singing again. It's a pop song, but the princess sings like it were an opera. Her own spine tingling lament.
She's singing partly for him (because he asked), but partly for herself. The sound makes her happy, distracts her mind.
She's the second woman to have sung for him, since his mother passed away. Maybe one day, he'll teach her the song he learned from the first.