I'm looking for a story where Steve goes into subdrop after battles. It's Steve/Tony, eventually Steve/Tony/Bucky. I seem to remember Tony and Bucky having a conversation about how Steve was in subdrop after the train and that's why he flew the Valkyrie into the ocean.
Thank you for your help!
Edited: 8/12/2015, because autocorrect thinks "subdrop" should be "subgroup" go figure.