Okay, I'm a little vague on what I remember of this fic, but it was either a soulmate AU where they find each other by scent...or an A/B/O AU. Possibly a Sentinal AU. I think it' most likely a Sentinel AU. I remember that Erebor never fell but Gandalf still convinces Bilbo to go with him to Erebor. Thorin is getting forced into a marriage and while
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