Omega Interrupted
Bucky isn't a normal omega. He hasn't hit his first proper heat yet, but still it feels like he's in an almost constant state of heat. His sexual dysfunction causes the omega boarding school where he goes to send him to a clinic meant to deal with this stuff - a massive brick mansion in the middle of the beautiful woods. When Dr Steve Rogers, expert in omega medicine, sees Bucky however he's perplexed. He's never seen an omega with this particular problem before, especially not in someone so young.
So Steve decides to take him in, and since he doesn't quite know how to treat him, he just needs to experiment. And soon Bucky finds himself spending his days strapped to a chair or bench being subjected to all kinds of pleasurable machines and medical treatments by a very handsome alpha doctor...