Y/N vanished at the end of first year at Hogwarts, but she never truly left—cursed into the body of a black cat, she watches from the shadows as her friends and housemates grow older without her. Adopted by Pansy Parkinson and surrounded by the Slytherin boys she once knew, Y/N struggles to remain herself while the curse slowly tightens. As loyalty, magic, and secrets collide, the group must uncover the truth and break the spell before the girl they love is lost forever.