After three years, their trysts were more than hate, more than punishment. Hate was a convincing cover-up because neither man (Snape) would ever admit that they (he) wanted the other man (Lupin); want which Lupin suspected (knew) had slipped into need.

Severus Snape and Remus Lupin: they go together as chalk goes with cheese. The duo knew just which button to push, just what to say, just how to act to piss the other off.

Lupin pays Snape a visit about the werewolf essay he assigned his students.

Snape pays Lupin a visit about the Boggart he made his students do.

Times are getting dark. James had been told he will soon have to go into hiding. So he arranged one last bike ride with Sirius, to spend some time with him.

Snape wasn't sorted into Slytherin for no good reason, and he knew exactly when to use his natural Slytherin skills to his advantage. Tonks and Lupin alone were good, but together, together they'd be GREAT.

Remus Lupin joins Hogwarts as a staff member. Things don't start well between him and Severus Snape. He thinks Snape is still holding a petty schoolboy grudge. Aurora Sinistra pulls Lupin aside to have a friendly little chat about Snape, to help him understand the complex Potions master Can the two former enemies find a way to put their differences aside and make peace with the pas