The Owl Post was late. Minerva sipped her tea and gazed around the Great Hall. The grim, scowling countenance of the Potions Master caught her attention seconds before a flurry of owls burst through the windows. One swooped down towards Snape, whose black eyes glimmered as he took the envelope.
Had Minerva not been watching, she wouldn't have noticed the infestiminal softening of his eyes or the tiny quirk of his lips.
As he stood to leave, the letter slipped from his grasp. He swiftly bent to retrieve it but was too slow. Flabbergasted, Minerva read the valediction: Love, Hermione.