Born into the powerful Black family, twin siblings Y/N Black and Valerio Black arrive at Hogwarts already surrounded by expectations. Though separated into rival houses — Y/N in Slytherin and Valerio in Gryffindor — the twins remain fiercely loyal to each other above everything else. While Valerio forms unlikely friendships with Hermione Granger and the dangerous Riddle brothers, especially Marvolo Riddle, Y/N rules Slytherin beside Pansy Parkinson and Daphne Greengrass with elegance and quiet intimidation. As political tensions rise within Hogwarts and old wizarding families begin choosing sides, the Black twins become feared for one simple reason: No matter the house, no matter the conflict — they will always choose each other first.