At first I was a bit confused - it didn't seem serious at all, and I wanted to laugh when Harry's clothes disappeared. I pictured the pillow he hid behind as 'pink', and when he hid behind a scrap of window curtain, I was imagining this gaudy paisley.
But then it got further, and like Harry slowly realising there was no recourse for it, I started to really feel the tone of it, and I began to really like it. Oddly enough, what really hooked me was when Snape had to use a spell to get it up to help Harry - how he tried to do as little as possible to humiliate Harry, even giving him a chance to escape after 'just' penetration - and gave him time, after it was over, to remember slowly....
That was beautifully done and wonderfully. Thank you so much!