"What are you studying?" Hermione whispered, sliding into an open library seat.
The Hufflepuff glanced up in suprise before locking eyes with a dejected Krum who turned to leave.
"Subtle."
Hermione blushed but pointedly did not look at the retreating boy. "Subtle wasn't working. But, truly, you're studying...?"
"Spagyric arrays, they're used in advanced medical potions to transform the plant-based ingredients to allow for a duality of purpose."
"You're brewing medical potions?!"
"...no. That would be highly illegal."
"And highly practical."
"Yes," the girl whispered, before pushing a vial into Hermione's hands. "Highly practical."