"The red string of fate". If you find the other end of the string, you'll find your soulmate. You've waited so long that you slowly began to lose hope of finding the person who is connected to you by the string.

You're at a train station and you see a man walking around the station, probably looking for train schedules. You finally come over to help him.

"Hey, do you need help-" You ask him but suddenly you notice that his red thread on his pinky finger connects to yours