Harry Potter: The Story of Neville

My name is Neville Longbottom! The wizarding world is wide open! Hogwarts' little tyrant! I've got a bad case of "tyrant syndrome" and two fists full of "physical magic." If you've got a problem, let's fight! Life and death? Couldn't care less! (The protagonist transmigrates into Neville's body. Due to the long-term effects of the Memory Charm, he has lost most of his original memories. He changes some people's fates. The protagonist is the boss, doesn't fawn over anyone, and won't get involved in anything "dark." Hermione is the sole female lead. The writing is light and fluffy. If that's not your thing, please steer clear.)