Luna's entire body felt tingly as Hermione's mouth worked between her legs. She would have attributed it to some magical creature had she not been so certain that these tingles were without a doubt caused by the Gryffindor between her legs. She pinched her eyes shut, trying to will off her orgasm for a bit longer.
"Well, it's -ah- hard not to when you have the -mmm- brightest witch of the age between your legs." Luna moaned, interrupted by occasional whimpers and gasps. Her hips bucked into Hermione's hands that were holding her down.
Luna could feel her orgasm fighting to peak and she wasn't sure how much longer she could hold it back. After a few more moments, Luna let out a loud cry as she came, her body squirming on the bed, her fists clinging to the sheets.