Brian and Justin unhappy together, post-513

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Hi all, I'm looking for a fic I really enjoyed in which Brian and Justin's relationship is falling apart. I remember it was done very subtly and poignantly and at first I thought of Stitches, but as far as I recall it's not an AU. I believe it was set post-513, probably in New York, and I think I remember a scene where they just can't say what they mean and end up having angry/awkward sex (maybe Justin was wearing a school uniform, I think I remember there being a tie?). Sorry there's not much info, I hope you can help!

ETA: Found the answer to my own question! The fic was Into the Ether by bloodyrose82. Info on the series in comments.