Jungkook didn't think he would ever see the world the way his friends did.
Then Jimin came along and painted his world with color.
Or
That one AU where where you see color when you touch your soulmate.
You live in a world where people see in black and white. The solution to finally see the colors? It's simple. You need to meet your soulmate and look at him in the eyes, but what if the person bound to you is already contented with the monochromatic world? What if...Jeongguk, your soulmate, is already in love with someone else?
Alternatively;
"A future without you is a world without color."