Children of the whales

Reminds me a bit of the manga From the New World and No. 6 (both manga are superior to the anime). Post-apocalyptic world in which everything is covered in sand, and our main characters are on a moving island sailing across the sand sea. They've never seen another living human. Some characters are ‘marked,' which means they have magic, but they have short lives. One day, another island is spotted in the distant. A recon mission is sent, and our main character Chakuro finds a single girl on the island. They bring her back–and all hell breaks lose. The elders hold her captive and seem to have secrets from the other 500 or so inhabitants of the island, and the girl seems to know what these secrets are.

Being a first volume, it's sketchy and perhaps too quickly paced in parts. But the set up is intriguing, the world is really cool, and the art is gorgeous. I will most certainly be looking forward to the next volume.