Reminds me a bit of Old Soldiers, by way of a bit of the premise (generally the only good part) from whichever one of Skysaber's fics had a insert-as-Hermione go to St. Trinian's. In other words, I require more details on these "hijinks," "shenanigans," and ensuing "hilarity" 
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‎noli esse culus
‎noli esse culus