True North (слэш)

No one really knew exactly how soulmates worked. Some people had them, some people didn't, and you only knew which you were if you happened to look up one day and realise your soul was reaching out for someone who was reaching back for you. Except sometimes, not often but sometimes, it went wrong and you'd look up and find your soul reaching out for someone who couldn't feel you at all. And you just had to live with that, your soul reaching out for them forever.
If you were lucky, the other person would be nice about it. Steve was lucky, for a given value of lucky; Bucky was a good person. But if he'd been truly lucky, the universe wouldn't have screwed him over in the first place.