The Impossible 'O'

A rather confident and assertive Hermione is determined to exclusively get perfect grades in her final N.E.W.Ts. Too bad that ever grumpy Snape NEVER gives 'O's, let alone to a student of a rival house. Hence, the stubborn witch hatches a daring plan which is totally getting out of hand and eventually gets the overzealous Gryffindor way more than she had bargained for... One-shot