I don't know what the title is...

[quackaquacka]

I first read this on Azkaban's Lair. Snape thinks Remus is gorgeous, and winds up getting a bit...carried away. It ends with Remus hiding behind James, Sirius beating Snape up, and Snape thinking something along the lines of 'I deserve this for hurting him'.

That's a horrible description with not a lot of information, I apologise. Can anyone help?