This will be 10 chapters, told in a series of small snapshots. It's inspired by a collection of prompts on tumblr about types of kisses.

I don't own anything! It all belongs to JKR.

Hermione Granger, newly instated Transfiguration professor at Hogwarts School of Witchcraft and Wizardry, stood facing the Headmaster with her hands on her hips. "You can't just cut mice out of the curriculum because you want to use them for ingredients," she ground out, eyes flashing.

"As the Headmaster of this school, I will do what I see fit," Snape replied, his voice low and cool.

"Merlin, you are so exasperating. I could just – " She cut off abruptly.

"You could just what?" Snape inquired, studying her.

Her eyes flashed to his lips for a fraction of a second, but that was all it took. Snape's lips crashed on hers, taking her breath away. She responded passionately, bringing her hands up to tangle in his robes and pull him closer. He guided her backwards until her shoulders hit the wall, eliciting a gasp from her. He slipped his tongue into her open mouth, and her mind whispered that Snape was a surprisingly good kisser.

Another gasp, this time of realization. She pressed her palms into his chest, pushing him off of her. As he took a step backward, meeting her eyes in surprise, he seemed to gather himself.

"Miss – Professor Granger, I apologize. That was . . . out of line." With his robes billowing behind him, Snape swept away, leaving Hermione alone in the corridor.

She let herself lean back against the wall and touched one hand to her tingling lips, watching him go. The feel of his lips, the fire in his eyes – Hermione had to admit that she didn't regret kissing Severus Snape.

1. The Unbreakable Kiss: The type of kiss that really shouldn't be happening - it's a mistake, but you just can't find yourself able to pull away.