I love the pace/progression of this, and how you’ve written them as equals--as cunning as each other.
The way they verbally sparred and danced around one another was so ‘them’, and your Severus was deliciously snarky. And of course there was the scorching scene in the loo as well. :)
Oh, and as a side note, "New Organisation for Society, Education and Youth" jumped out at me and made me grin. :D