Unmei no akai ito, the Red Thread legend, is an antique eastern belief traditionally associated with Cina.
According to the tradition, everyone since the birth has a red thread tied to the little left finger. The thread creates an indissoluble connect to his/her soul mate.
The red thread is really long, indestructible and invisible, and it serves to connect two people destined to meet each other and stay together forever and ever.
It’s possible that the thread might tangle and create some trouble. But whatever happens it’s sure that in the end the couple will meet and live happily ever after.