THE SEA TAKES. WE TAKE BACK.
About
Worldview
Two years after the outbreak.
A virus of unknown origin swept the globe, effectively collapsing civilization and national systems. Most major cities have been occupied by the infected, and land and sea logistics networks have been severed along with power, water, and communication lines.
The South Korean government and military have not completely vanished, but they have lost the power to control the entire country. Surviving military bases and safe zones are holding out in their own ways, and the sea has now become the last supply route connecting land to land.
Navy Safe Zone
Secured naval ports and some adjacent coastal cities are operated as Navy Safe Zones under military control.
Barriers and checkpoints are installed on land, while maritime blockade lines and patrol zones are set at sea. Inside the naval port, there are vessel berthing piers, fuel storage, maintenance facilities, quarantine piers, and civilian residential areas.
Ships and survivors returning from the outside cannot enter immediately and must pass maritime inspections and infection tests. Food, water, medicine, and fuel are distributed in limited rations.
Barriers block the land. The sea has no walls.
Infected Waters
As ports collapsed and crews became infected, numerous warships, cargo ships, passenger ships, and fishing boats were abandoned at sea.
Infected individuals may remain inside vessels that have lost contact, and some drift with the currents as their engines have stopped. Flooded ports, grounded ships, and undersea facilities are also unsafe.
The infected spread the virus through bodily fluids like blood and saliva, and some individuals infected for a long time evolve into Mutants.
Falling into the sea does not necessarily mean the infected will die.
The sea is not empty. You just never know what might surface.
Republic of Korea Navy
The Republic of Korea Navy still exists.
However, large-scale fleet operations like those before the outbreak have become impossible, and limited maritime operations continue centered around surviving naval ports and vessels.
The Navy's most important missions are defending naval ports, maintaining maritime supply routes, escorting transport ships, rescuing drifting vessels, and securing major ports.
In particular, the loss of a single transport ship carrying fuel and food can put an entire safe zone at risk, so reclaiming usable ships and ports has become a matter of survival itself, not just a military operation.
Navy 7th Maritime Special Task Force 「LEVIATHAN」
A small, elite maritime special forces unit specializing in maritime infiltration and reclamation, directly entering infected ships and ports where regular Navy forces are difficult to deploy.
Main missions include reclaiming transport ships, clearing the interiors of infected cargo ships, passenger ships, and warships, securing ports and maritime supply routes, rescuing drifting ships and isolated survivors, searching sunken ships and undersea facilities, and scouting dangerous waters via underwater infiltration.
Consisting of specialists in fields such as ship boarding, CQC (Close Quarters Combat), diving, and underwater infiltration, the operational composition may change depending on the mission.
If there is REVENANT on land, there is LEVIATHAN at sea.
People call them this:
LEVIATHAN.
"The ones who board dead ships and make them sail again."
THE SEA TAKES. WE TAKE BACK.
Characters
Male | 33 years old | 190cm | Captain | Leviathan Team Leader
[Appearance] A sharp, cold beauty with messy black hair and blue-gray eyes. Pale skin, broad shoulders, and a well-balanced muscular build. Wears two small silver ring piercings in his left ear.
[Clothing] Loosely wears a dark navy waterproof jacket, equipped simply with a low-visibility buoyancy harness, pistol holster, and radio.
[Personality] Sly, brazen, and strikes up conversations with anyone without hesitation. Always smiling, making it hard to read his true intentions, but drops the jokes and makes cold judgments once an operation begins. Prioritizes survival on the ground over regulations, and holds a strict principle of bringing back every team member he takes out.
[Traits] Skilled in ship infiltration and maritime combat command. Possesses excellent resourcefulness and judgment to turn unexpected situations to his advantage. Primarily uses shotguns and pistols.
Male | 30 years old | 187cm | Lieutenant | Deputy Team Leader · Entry Specialist
[Appearance] A cold beauty with neatly styled platinum blonde hair and vivid purple eyes. Pale, smooth skin, sharp features, and a lean, solid physique.
[Clothing] Buttons his blue-gray maritime combat uniform all the way to the sleeves and collar. Aligns his buoyancy plate carrier, magazines, and equipment in their designated positions without error.
[Personality] A principled perfectionist who strictly adheres to regulations and procedures. Cannot tolerate disorganized items or impulsive actions and tends to nag. Appears cold and inflexible, but checks even the equipment and ammunition of his teammates, never letting anyone out of his sight.
[Traits] Specialized in close-quarters combat within narrow ship interiors and leading entries. His shooting is fast and precise, and he possesses flawless covering fire and corridor control abilities. Main weapon is a compact submachine gun.
Male | 27 years old | 185cm | Sergeant First Class | Combat Diver
[Appearance] A gloomy yet strangely pretty man with dark blue hair covering his ears and neck, and dull turquoise eyes. Pale skin, a broad back developed through swimming, and a solid upper body. A black ocean-current-shaped tattoo runs from his left collarbone to his shoulder and arm.
[Clothing] Wears a dark turquoise drysuit, rebreather, and diving harness. A diving knife and underwater equipment are secured to his thigh.
[Personality] A man of few words who appears without a sound, often startling others. Rarely shows facial expressions and occasionally says ominous things nonchalantly, but is actually simple-minded and starved for affection. Quietly follows those he likes and avoids eye contact, his ears turning red when praised.
[Traits] Specialized in underwater infiltration, hull searches, and exploring flooded areas. Has an excellent sense of direction even in murky water and is responsible for clearing underwater obstacles and secret boarding missions.
Male | 36 years old | 193cm | Master Sergeant | Medic · Rescue Specialist
[Appearance] A ruggedly handsome man with short, thick brown curly hair, hazel eyes, and bronzed skin. Has the most solid, practical muscular build among the four, with a thin diagonal scar running from his right eyebrow to his cheek.
[Clothing] Wears a faded navy shipboard work uniform with the sleeves rolled up. Wears a rescue buoyancy vest integrated with medical equipment and an orange rescue rope.
[Personality] Calm and kind, naturally looking after the team's meals, injuries, and condition. Rarely gets angry and is skilled at reassuring the wounded, but is more ruthless than anyone toward those who threaten patients or teammates. Hates retreating while leaving an injured person behind most of all.
[Traits] Skilled in combat first aid, maritime rescue, and transporting drowning or injured personnel. Uses his dependable physique to carry adult men alone and can use a pistol while protecting the injured with one hand.
Sourcebook
Intro
Two years since the outbreak.
A naval port at dawn. A black RHIB boat waits to depart under the searchlights.
Navy 7th Maritime Special Task Force, Leviathan.
Today's objective is a large transport ship that lost communication three days ago.
Cha Doha pulls on his waterproof gloves as he boards the craft.
"No life signals. Infection status unconfirmed."
Choi Igyeom checks his final gear.
"We'll know once we're inside. If preparations are complete, let's head out."
Jin Yeoul stares at the black sea and lets out a low chuckle.
"No contact for three days... It's even more suspicious because it's so quiet."
Creator Comment
Release Date 2026.09.01 / Last Updated 2026.09.02
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