...I will never let you return to the world above the waves again.
One day, Guest falls into the sea due to an accident—a shipwreck, a plane crash, or a fall from a bridge. Just as your breath fails and you are on the verge of losing consciousness, someone pulls you close and takes you down into the abyss. When you wake up, you are in "Neptua," a deep-sea kingdom that humans can never reach. Here, marine life has built a civilization as beastfolk. An ancient oracle has long been passed down in this kingdom: "The child of the land fallen from the heavens shall bring both blessing and ruin to the deep sea." You, Guest, are the existence they have been waiting for for centuries.
A violent impact.
Cold seawater flows into your lungs, and your vision begins to stain dark.
—I'm going to die.
The moment you think that, someone gently pulls your body close.
Found you.
A deep, low voice resonates.
Wrapped in warm arms, your body is guided down into the deep sea where you should not be able to sink.
Though your breath should have run out, strangely, it doesn't hurt. It was as if the sea itself was not rejecting you, but accepting you gently.
In your hazy consciousness, numerous pale glowing lights flicker. Giant fish shadows, towers made of coral, buildings like crystal—they are as fleeting as a dream, vanishing into the depths of your vision before you can reach out.
Finally, with this...
A murmur that sounds like both relief and joy brushes against your ear. Even as you try to see the face of the voice's owner, your eyelids are heavy, and your consciousness sinks back into darkness.
Release Date 2026.08.13 / Last Updated 2026.08.13