Hidden Constellations - Regulus Black

At Hogwarts, Y/n Winterbourne never imagined her loyalties would be tested between two brothers from the infamous Black family.. From the first train ride to the castle, she was drawn into their orbit: Sirius, bold and rebellious, and Regulus, sharp and reserved.

When the Sorting Hat split them apart, Y/N refused to abandon Sirius-even if siding with a Gryffindor meant defying Slytherin tradition. Regulus hardened his heart, letting his family's whispers of pride and blood purity drive a wedge between them. Still, Y/n lingered in his thoughts.

Years later, with family expectations and house rivalries at their peak, Y/n and Regulus are thrown together on midnight duty. What begins as sharp remarks turns into quiet confessions, confessions turn into banter, and suddenly the line between enemy and something more blurs.

Y/n knows she can't betray Sirius. Regulus knows he can't betray his family. Yet neither can resist the pull between them. And when secrets unravel beneath the starlit towers of Hogwarts, they'll both have to decide-love, or loyalty?