Wow. Gosh, what to say! Just, wow. That's amazing.
I love the combination of Snape's tender emotion with Viktor's sated happiness, and I love how this just makes them seem so much more connected - it speaks volumes about their relationship that one can be casually winding down and the other tenderly showing his appreciation and yet both completely understand that despite their different response, they're both thinking only of each other.
I love seeing Snape so tender and yet still so Snape.
I love seeing Viktor so certain and self-composed yet leaning into Snape's embrace, and you can see his mind melting into that kiss, even if his body isn't.
Just, wow. There is so much in this, it's wonderful. Wow.