The fanfiction "When The Stars Align" tells the story of Astra Black, Sirius's younger sister, who feels like an outcast in her dark wizarding family. She finds an unexpected connection with Remus Lupin, a new Hogwarts student and a werewolf. Despite their initial clashing personalities, they form a deep bond based on their shared love for magical creatures and their outsider status. As their friendship grows, Astra discovers Remus's secret and becomes fiercely loyal, defending him against her family's prejudice. This betrayal leads to Astra being disowned, and she finds a new family with Remus and the Marauders. Their love strengthens as they face the First Wizarding War and its tragedies. The story concludes with their happy marriage and a family of their own, a testament to how love and acceptance can overcome societal expectations and family traditions.