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“Harry, what have you done to my bookcase?” Severus began in dangerous tones that went completely over Harry's head.
“Organised it.” Harry answered from his chair.
“And may I ask what system did you use to 'organise' it?”
Heaving a sigh Harry stood up, moving towards the shelves in a business like fashion. Motioning to the left most side he said.
“These are the red books, right through to purple,” He said proudly. “Under are the black - there was a lot of those - and at the ends are the really pale ones, like clouds see. You didn't have any orange or yellow books so I put some of my story books in.”
“You... arranged my books in rainbow order...”
“With clouds.” Harry grinned eagerly.
Severus' eye twitched, because really how could he be expected to deal with this amount of aggravating cuteness when he was so upset. “Yes, well... er...” He coughed, uncomfortably. “Just don't do it again.”