Sirius Black high-fiving Lily Evans every time she raises her hand in class. Sirius asking James to high-five her when he is too sick to come to class. Remus Lupin doing it with a sigh and an immediate apology when neither Sirius or James are available. Peter being overly enthusiastic about being asked to do it and accidentally slapping Lily in the face.

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I apologise guys. These headcanons are getting shorter and shorter...I promise for a longer one next time!

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