A Very Unprologue-ish Introduction

Where is the line between vandalism and the expression of one's creativity? When a student of Hogwarts starts writing on the walls of the school, signing with the name "Anophelia Miratio", she stirs the school's curiosity and a wave of whispers fills the hallways. Whispers about the "who" and the "what" and the "why". This story begins when another student, Ephydatia Tefeltast, concerned about the writings, leaves an angry letter at the crime scene, addressing the mischief-maker and, so, a strange correspondence begins!

(Starts 17 years after the end of the Deathly Hallows)