He sighed and leaned on her bed. "Promise you won’t tell anyone, okay? But apparently, when Snape was our age, he was in love with a muggle-born girl. They were really good friends until he made the mistake of calling her the m-word." Hermione snorted at his description but schooled her expression when Draco glared at her. "Anyway, the girl wouldn’t talk to him after that. Soon she married and had a kid while Snape became a Death Eater. Her son ended up becoming Voldemort’s target and Snape begged to not harm her. But Voldemort did kill her. That’s when he went to Dumbledore."