Finally (A USUK fanfiction)
Arthur Kirkland is an average human. He, like everyone else, has a special necklace. It's supposed to get warmer the closest you get to the one you are destined to be with. Although, his seems... off. No matter what direction he goes in, it doesn't seem much warmer. He's about to give up on it, admit defeat and say he is destined to be alone.
Until it suddenly feels warm.
(This is a Hetalia USUK Fanfiction AU where everyone, once born, has a necklace that heats up when they get closer to their soulmate)