At Hogwarts School of Witchcraft and Wizardry, Y/N always believed Theodore Nott was simply her closest friend — the dramatic, charming Slytherin who had been glued to her side since the day he panicked during her asthma attack in second year. But as the years pass, Theodore’s loyalty begins to feel less like comfort and more like control. His jealousy grows sharper, his attention harder to ignore, and the line between devotion and obsession starts to blur.