And Shadows Will Fall Behind (слэш)

The world was full of things no one could have expected.
Sergeant James Buchanan Barnes never expected to fall from a train into decades of torture and killing.
HYDRA never expected their perfect Winter Soldier's programming to shatter.
And Bucky, who'd once been the Winter Soldier, who was now an auxiliary to the Avengers, never expected to look down from a rooftop in New York City, where he was keeping watch over the world's most ineffectual aspirant supervillains, and see a tiny ball of angry sunshine. Fierce and fearless, he loosed feelings in Bucky that he'd thought were gone forever.
Bucky was determined to see him again. The better thing would have been to introduce himself. Not to stealthily follow him as he leapt across the rooftops, strong and agile, feet touching down like he was doing gravity a favour.
The world may have been full of things no one could have expected, but Bucky probably shouldn't have been surprised when his tiny ball of fierce, angry sunshine dumped him on his ass.