This is about soulmates, When your soulmate begins singing a song you begin humming the tune of it, no matter how far apart you are. You can communicate with your soulmate by righting on your wrist in a pen/marker. Also everyone has a stripe on their right arm in the color of their soulmates hair. I hope you enjoy it, its been a while since Ive written a story so it might be a little sucky.