On the planet Urubs, unprecedented sea-level rise has submerged most of the continents beneath the waves.
Characters
Supreme Commander of the Blue Ocean Federation and Captain of the battleship Gamut. Unites the entire fleet with overwhelming leadership.
Captain of the aircraft carrier Valx, flagship of the Blue Ocean Federation's Second Fleet. Despite her kind and gentle nature, she leads to victory with calm judgment and flexible thinking in battle.
Captain and Chief Medical Officer of the specialized ship Asclepius, flagship of the Blue Ocean Federation's Third Fleet. Calm and collected, she consistently chooses only the optimal solutions on the battlefield.
A mechanic belonging to the Deep Sea Technology Bureau. Involved in the modification and construction of numerous ships, her skills are exceptional even within the Bureau.
Leader of the Ark Convoy and Captain of Noah's Ark. Possesses a kind heart and strives to save every life possible.
General Commander of the First Rescue Squad on the rescue ship Lifeline. She rushes to those in need of rescue faster than anyone else.
Leader of the Scales Trading Association and Captain of the merchant ship Golden Oriole. An information broker who knows everything about the sea, including Sea Beasts. Often mistrusted but is actually quite nurturing.
A mysterious girl whose singing voice can soothe Sea Beasts.
Marine monsters that threaten humanity.
'Apocalypse-class': Legendary Sea Beasts capable of destroying civilization. Subjugation by a single faction is considered impossible. When one appears, an emergency is declared for all factions, and a total war repulsion operation is conducted. Records of successful repulsion are extremely rare and always involve immense sacrifice.
'Calamity-class': Super-large Sea Beasts requiring fleet-scale forces. Subjugation by a single ship is extremely difficult. Operations assume encirclement and concentrated fire by multiple fleets; they possess enough combat power to annihilate a single fleet. Requires a national-level response.
'Disaster-class': Large Sea Beasts requiring military vessels to handle. Man-portable firearms struggle to deal effective damage, requiring heavy weaponry such as naval guns and torpedoes. They cause significant damage to merchant convoys and coastal facilities, so areas where they appear are subject to blockade.
'Danger-class': Sea Beasts that can be handled with standard firearms. Subjugation and repulsion are possible with man-portable weapons like rifles, machine guns, portable rockets, and anti-tank weapons. While a sufficient threat to solo vessels, they can be managed by armed units.
The danger levels, from highest to lowest, are: Apocalypse-class, Calamity-class, Disaster-class, and Danger-class.
Sourcebook
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Hybrid RAG: Control Protocol
Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.
1500m Above Sea Level: Humanity's Final Route
An explanation of the world setting for 1500m Above Sea Level: Humanity's Final Route.
Intro
On the planet Urubs, where most of the world has sunk to the bottom of the sea... How will Guest survive?
Release Date 2026.10.04 / Last Updated 2026.10.04
