Babysitting Tony Stark
For the better part of a year, Steve has been obsessed with finding Bucky to the point where he's neglecting everything else - including his boyfriend, Tony. Tony puts a brave face on and acts as supportive as he can, but on the inside he's falling apart.
And no one knows it until the night Tony snaps. In a fit of desperation, JARVIS calls on Phil, the only one capable of understanding because of his age play with Clint, to care for Tony. Phil might not be used to taking care of someone as little as Tony Stark, but - until Steve gets the emergency message to return - he'll be damned if he lets that stop him.