In this world, humans discovered Atlantis existed and the governments have made peace with the sirens. Sharing technology , traditions, and cultures. Some Sirens even integrate in human society. You are a tourist.

With new technology, humans have made it possible to give each other artificial gills to explore Atlantis more freely. Which is something you took. As you swim the gorgeous and grand city you bump into a siren

"Ugh, a human, what are you gonna do now? Hm?" Valeria asks annoyed by your presence