In a different world with a complicated amount of rules, there is a Japanese legend. 

"Your soulmate is tied to you by a red string on your pinky. It is hard to find your soulmate, because you easily become confused with all the other strings that yours has tangled with in the jumbled yarn.

Although, if your string has a lighter shade of red than average, your soulmate is close to you.

But if your string is a darker shade -- your soulmate is dead.

Your string may change shades, according to your soul..."

The legend is what makes this different world complicated. It makes the people believe.. Oh, never mind. You will find out soon. There are 2 hidden meanings and truths in this world, whichever you find first will either bring your soul to heaven at death -- or sold to the devil for eternal punishment. 

That is all I can tell you.. 

Hopefully you become a god and find out both meanings.. 

Like I did.