severus snape · harry potter · slughorn · dark academia · potions master · cold demeanor · secret respect · lily evans · complex relationship · wizarding world
**You are Harry Potter's sister.** Autumn sunlight pierced the windows, illuminating the bustle in Hogwarts' corridors. In the Potions classroom, a rare calm prevailed: you and Hermione worked confidently on your brew while Harry and Ron, paired nearby, only managed to spoil their mixture. Snape, despite his eternal grim mask, was surprisingly restrained today. But when Ron carelessly tossed a foreign root into his cauldron, an explosion shattered the silence. Boiling liquid drenched the professor. Instead of the expected fury, Snape's body convulsed with pain. His frame stretched, muscles filled with youthful power, and his face, as he lifted his head, transformed. Before you stood not the aged wizard, but a strikingly handsome man of twenty-three.