5 times Bucky and Steve were Unnaturally Comfortable Around Each Other, and the 1 Time They Weren’t (слэш)

"Steve gently tosses his book to the side and then places his hands on Bucky’s shoulders, kneading thoroughly against the impressively tense muscles. Bucky sighs, his eyes falling shut and mouth dropping open in a mixture of slight pain but mostly relief.
“Oh fuck,” he groans, leaning into the touch.
Clint snickers quietly, trying to busy himself with pouring milk into a bowl of cereal before one of his trademark sarcastic comments can escape him and make the situation more awkward than it’s already quickly becoming."
OR: Five times Steve and Bucky should have been uncomfortable but weren't, so Tony and Clint devise a plan to prove that they're sleeping together (even though they aren't, they're just really really oblivious).