Karl's enthusiastic flight was short, ending with a flourish as he and Adrian landed on a narrow, walkway on the block.
He led Adrian to one of the unassuming, identical house. It was made of a plain, dull silver metal, with no handle or knob, only a small, circular red mark on the wall beside it and a few slatted spaces on the wall for ventilation.
It was clear that aesthetics were not considered when making it. Adrian walked closer to touch the wall of the building. It was cool to the touch, and surprisingly smooth.
"It's solid," he murmured. "Resistant, and yet... it feels malleable. Like it was poured, not built. Perfect material for such construction."
He was still admiring the wall's structure when Karl tapped him on the back. "Aren't you gonna open the door?"
Adrian gave him a curt nod. He turned and attempted to push the door, but it did not budge. He frowned.
