Wow! Totally blown away. Not sure I even breathed from the moment Remus started yelling outside Snape's building. Fabulous lines, esp this:
As he struggled to think of what to say or do, Remus’s gaze settled on Gideon’s half-drunk cup of tea, still sitting on the coffee table from two days before, cold. There was a rushing pounding in his ears, and he was overwhelmed with the desire to stand and pick up the tea cup and rinse it out and put it away, so that it would stop being there.
Really stellar writing -- fierce and emotional and captivating. Whew!