For ease of following particular threads of conversation and relationships, Remus has been kind enough to gather his links together. Some links may be to the letters of other Hogwarts students.
Remus & Sirius, OTP
In which Sirius assures Remus that being a werewolf is pretty ace, and Remus tries to trade secrets.
In which Sirius wonders why Remus doesn't discuss Sirius's fine arse, and alternative uses of brooms.
In which Sirius tells Remus not to go home after a very bad moon, and then helps him fall asleep.
In which Sirius berates Remus for not asking for help, and then they discuss Sirius's pouty lips.
In which Sirius reacts to learning Remus has been invited to a Muggle girl's school dance.
In which Remus asks Sirius for advice on girls, and then cures Sirius's headache.
In which Sirius misunderstands and has a fit, and Remus avoids him.
In which Sirius teaches Remus how not to hit like a girl, in a bit of a timeline jump.
In which Sirius learns Remus is going to Italy, and then they plan their first date.
In which Sirius is sexy, and Remus is left wanting more.
In which Remus gives Sirius another birthday present, and is turned on by Sirius's sexual innocence.
In which Sirius tests Remus's trust and tolerance, and Remus accidentally stakes a claim.
In which Sirius is nearly indecent in front of infirmed firsties.
In which Sirius is surprised, Remus is jealous, and watch out, it's huge. (Unfinished.)
In which they finally say it.
In which Sirius is jealous, and Remus kinda likes it.
In which they discuss holiday plans, and then switch things up in the sack for a change.
In which Sirius wishes to celebrate the New Year in the common room. (Unfinished.)
In which Remus doesn't want to share, and things go very wrong before they go very right.
In which Sirius asks A Big Question, and sex is had. (Unfinished.)
Remus & Friends
In which James suggests checking out the Forbidden Forest to look for werewolves.
In which Rabastan introduces himself to Remus, and Remus dispenses Good Advice.
In which Rabastan and Remus discuss proper pureblood behavior, dating an older girl, and Quidditch.
In which Lily tells Remus not to inflate Sirius's ego.
In which James and Remus disagree on the various ways of getting good marks.
In which Andromeda offers advice on girls, and gives a lesson on ancient Greek social norms.
In which Rabastan discloses some worrisome family secrets, but doesn't let Remus help.
In which Andromeda learns that Remus knows that she knows, and assures him that she's fine about it.
In which Ted discusses the weather and he and Remus try to define what RemusAndSirius are.
In which Ted shares odd quicks of Andromeda's, and suggests a secret handshake.
In which Rabastan is concerned with the dangers of motorbike-riding, and discusses wizards vs. Muggles.
In which Lily brings Remus some homework and appreciates honesty.
In which Rabastan expresses a desire to take vengance on Sirius for Remus, and then things get awkward.
In which Ted is entirely too rational for Remus's tastes.
In which James tries to cheer Remus up, and it actually works a bit.
In which Lily is inquisitive, and Remus is deflective.
In which Rabastan casts aspersions on James's character, and James and Sirius get involved.
In which Lily asks about Remus's girl problems.
In which James and Remus have a rather heated discussion.
In which Rabastan offers advice about Telling the Parents.
In which Rabastan inadvertently flaunts his wealth.
In which James makes tea, and is quick to deny blame.
Remus & Enemies
In which Regulus doesn't visit Remus in the infirmary, but rather is looking for something for a headache.
In which Regulus tries to help Remus forget about Sirius and what Sirius did.
In which Regulus mocks Remus for holding hands on a date.
In which Regulus is a Little Slytherin Sunbeam for an infirmed Remus.
In which Regulus meets up with a disturbingly odd Remus, and then Sirius joins in. Also huge.
Remus & His Teachers
In which McGonagall reassures a freaked Remus that he belongs at Hogwarts.
In which McGonagall offers some sympathy and sage advice to extra-woobly Remus.
In which McGonagall plays along, offers some suggestions for the future, and Remus is rather Zen.
Remus & His Students
In which Susan is not born, but tries to help anyway.
In which Remus spills is love-filled guts to Susan, though she is still Not Born.
In which Anthony and Remus have a Very Deep Discussion about dogs, art, and secrets.
In which Remus delivers some bad news to Anthony.
Always a work in progress...