Separated as children from her first love, Mattheo Riddle, Y/N Malfoy spent years at Beauxbatons with her memories of him completely erased. Now transferring back to Hogwarts, a confused Y/N wanders the chaotic corridors of the train until her brother, Draco, spots her and happily pulls her into the Slytherin compartment. While her natural charm wins over a wary Pansy and Theo in less than five minutes, it is the silent boy by the window who freezes. Mattheo instantly recognizes the only girl he ever loved and never got over—but the blank curiosity in her eyes delivers a heartbreaking shock: she doesn't remember him. Fueled by a fierce, possessive determination, Mattheo breaks his cold armor, slides right next to Y/N, and glues himself to her side, vowing to spend every second making her remember the childhood romance she forgot.