The Countdown

Everybody has a clock on their wrists that counts down until they meet their soulmate. Sam Winchester has been waiting for all of his 14 years, and his older brother Dean has been waiting for his 18. They've been watching the clock countdown slowly, till the third week of September, when school started back up.
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Meanwhile, Castiel has had his clock covered since he was six, and ten years later, he is beginning to feel like he should look at it. His older brother, Gabriel, has watched that clock for as long as he can remember.
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And now, we begin.