[Harry Potter] Even a Chuunibyou Has to Save the World!

Hecate, the little princess of the Malfoy family, went on an outing and unexpectedly met Tom, a magical little boy from a Muggle orphanage. Tom (with an excited, slightly unhinged look): I hanged Billy's rabbit... I hate that boy! Hecate (calmly): Hanged it? How crude. You're a wizard! You should have had your fill of pranking him with jinxes first, then Petrificus Totalus, Diffindo, and Vanishing Spell. Done. Tom: ... Later, they met again at Hogwarts and sat together at the Slytherin table. Abu: Little sister, could you stop thinking about blowing up the school every day... Hecate: No, brother. I only want to destroy the world. Tom: ...Am I supposed to save the world? Please note: The author has lots of abandoned projects and updates slowly. This story doesn't bash Gryffindor or the headmaster. If you want to read about Dumbledore, the White Wizard, bullying poor little Voldemort, please turn right and keep going. The author is a die-hard headmaster fan. The girl comes with a Mary Sue trait (?!), while the Dark Lord comes with a chuunibyou trait. Chuunibyou and Mary Sues are a perfect match (≧▽≦) It's not long, and the historical details are lightly researched. Suggestions are welcome. Thanks for your understanding. I'm committed to fluffy, silly sweetness. If anything seems off, it's definitely because the author's brain is wired wrong. The main characters are still fluffy and silly. Weiyang is soft, cute, and a bit of a goof. If you're interested, visit and follow the author's page below↓↓ Mwah~ Premise: