Ahh, short, sweet, and hot -- just the way I like it! ;D And truly, what a lot of hotness in just 850 words!
What I really like about this is the sense of doing something in public at which he totally shouldn't be caught -- yet it's only an illusion. You've created a Charm that's as real and vivid to the reader as to George himself.
And the ending, with George thinking about sending a matching Charm to Harry in the hopes that he might "see something similar"? Great! Hee!