A Mark Like Mine (The Loneliest Number Remix) (слэш)

When Tony Stark was born, he had dozens of soul marks scattered across his skin. After Afghanistan, he had none.
Steve Rogers has only ever had one soul mark. And that was since he woke up.
People are born with multiple marks. All Tony has ever prayed for is just one to call his own. Whoever Steve's soulmate is, they're the luckiest person alive.
Tony would give anything to have someone. Especially someone like Steve.