Only You (Your Promises Made True)

Sirius Black is nothing but heartbreak. Remus has no idea what he's in for when he starts a relationship with Sirius, but could it possibly be worth it? After all, no matter what he does, he can't get over Sirius. A WolfStar, through Remus' eyes and through flashbacks. A romance told in three parts. Canon, mostly, except for the part where Sirius dies. Angst with a happy ending.