Trapped In Another World

In the big city, there are nine students who have normal lives like most people. But who would have thought when they found a box lined with red and gold stones, inside there was an ancient cloth that changed their lives. They were sent to the village above the clouds. They didn't know which part of the earth, or perhaps the village that was in another world, the village that was cursed decades ago. It requires them to fight the cursed village and take nine red stones to remove the curse on the village above the clouds and they can return to the world they live in. Will they succeed? Or even the failure they got? If they failed, they wouldn't be able to get out of that world. They will be trapped.