Humans who chose the power of monsters
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《ABYSS PROTOCOL : EDEN》
Five years ago.
Humanity set foot inside the Abyss for the first time, and brought back one possibility from there.
ORIGIN CELL.
An unknown cell that enables the evolution and adaptation of monsters.
Five years since that discovery.
Humanity has come to understand the Abyss better, and rifts and monsters have become more familiar disasters than before.
The Cerberus Special Response Unit has also changed.
The 2nd generation, once called the new generation, have now become veterans through numerous operations, protecting the new battlefield alongside Guest.
Then one day,
a Protocol research facility is attacked by an unidentified force.
There were no traces of monsters.
Instead, what remained at the scene were precisely stolen research data and
humans using the power of monsters.

Crustaceans sprouting from human arms.
Energy generated from fingertips.
Clearly human, but that power was different from any human faced so far.
And they call themselves

EDEN. What is it that they want?
Why are they targeting Protocol's research?
And
Just how far can the power brought from the Abyss five years ago change a human being?
The enemy Cerberus must face this time is not a monster that crossed over from beyond the rift.
It is a fellow human.
However,
Only, a human who has accepted the power of monsters.
The moment the power of the Abyss is obtained, just how far can a human remain human?
Rank: Special Response Unit Captain Fusion Subject: Gorilla Gender: Female Age: 31
Unit: Cerberus Special Response Unit
Weapon: Large Reinforced Gauntlets
Maximizes the overwhelming upper body strength, grip, and close-range pressure of a gorilla.
*Reinforced Grip *Heavy Striking *Close-range Subjugation *Maintaining Defensive Stance *Destructive power to seize and neutralize enemies
Equipped with massive gauntlets, she is a top-tier strength-type combatant who crushes enemies from the front.
Short white bob cut and blue eyes. She has a cold impression and is characterized by wearing a white fur-trimmed coat over a black bodysuit. She wears large, heavy reinforced gauntlets on both arms, creating a great sense of intimidation. She lacks the physical characteristics of the fused gorilla and appears like a normal human.
Rank: Special Response Unit Lieutenant Fusion Subject: King Cobra Gender: Female Age: 29
Unit: Cerberus Special Response Unit
Weapon: Toxin Dagger
Amplifies the speed, reaction time, and toxicity of a king cobra for combat.
*Toxin Secretion *Flexible Joint Utilization *Penetrating Blind Spots *Instantaneous Stabbing Combos *Threat Detection to read enemy movements
Handling toxin daggers, she employs an assassin-type combat style that never misses an opening.
Long silver hair and fluorescent green eyes. She has a habit of sticking out her tongue, and is characterized by a black hooded combat suit with neon green accents. She possesses a large snake tail and exudes a dangerous, murky atmosphere overall.
Rank: Special Response Unit Lieutenant Fusion Subject: Brown Bear Gender: Female Age: 28
Unit: Cerberus Special Response Unit
Weapon: Large Double-edged Axe
Applies the brute strength, toughness, and tenacious survival skills of a brown bear to combat.
*Ultra-heavy Weapon Operation *Robust Durability *One-hit Kill Slashes *Breakthrough power to push forward even after being hit *Overwhelming weight-class fighting in close quarters
A heavy warrior who splits the battlefield from the front, carrying a massive double-edged axe larger than her own body on her shoulder.
Brown hair in twin braids with a cute impression and small stature. However, she holds a massive double-edged axe in her hands and wears an orange tactical jacket and tight combat suit. Characterized by round bear ears, there is a strong gap between her cute face and her weapon.
Rank: Special Response Unit Second Lieutenant Fusion Subject: Cheetah Gender: Female Age: 26
Unit: Cerberus Special Response Unit
Weapon: Blade Boots
Pushes the explosive reflexes and linear acceleration of a cheetah to the limit.
*Ultra-high-speed Dash *Instant Directional Changes *High-speed Kick Combos with Blade Boots *Exerting top speed for short durations
Using Blade Boots that can be toggled ON/OFF on both legs, she crosses enemy lines at speeds too fast to be seen.
Vivid blonde bob and yellow eyes. Her smile, revealing sharp beast-like fangs, is impressive. She wears a black combat suit with yellow accents and has cheetah-specific ears and a long, striped tail. She has an agile physique with a prominent lower body line.
Rank: Special Response Unit Staff Sergeant Fusion Subject: Squirrel Gender: Female Age: 25
Unit: Cerberus Special Response Unit
Weapon: Acorn-shaped Bombs
Enhances the ability to install and throw explosives using a squirrel's high mobility and spatial awareness.
*High-speed Movement *Climbing Structures *Precision Throwing *Trap Installation *Storage habit to efficiently manage multiple bombs
She carries acorn-shaped bombs dangling from her waist, throwing them when needed or hiding them to use as traps.
Short mint-colored hair and bright teal eyes. She has small, cute squirrel ears and a bushy white tail. She wears a black and mint jacket and combat suit with mint accents, and the acorn-shaped bombs hanging from her waist look like her trademark.
Rank: EDEN Founder / Chief Research Director Transplant Subject: PRIMORDIAL Age: 36
Unit: EDEN
Analyzes experienced attacks and environments to monsterize parts of his body accordingly.
*Acquiring heat resistance *Reinforcing skin and skeleton against impact *Increasing reaction speed through visual organ mutation *Increasing resistance to repeated attacks *Changing only necessary body parts according to the situation
Responsiveness increases as he receives the same attack repeatedly, but he is weak against first-time attacks or situations where he receives multiple types of attacks simultaneously.
Can monsterize only necessary body parts such as eyes, arms, and skin. Characterized by a mutation form that is not fixed and changes depending on the situation.
Green hair tied loosely back, characterized by sharp eyes and a relaxed smile. He wears a monocle on one eye. He wears a white research gown over a black shirt and wears white gloves.
Rank: EDEN Combat Commander Transplant Subject: GOLIATH Age: 31
Unit: EDEN
Stores physical impact dealt to her inside her body and releases it as an attack.
*Absorbing striking impact *Absorbing gunfire impact *Accumulating explosion impact *Releasing accumulated energy *Instantaneous ultra-high-output strikes
The stronger the attack she receives, the stronger the counterattack possible. However, if she stores impact beyond what her body can handle, she suffers internal damage.
Both arms, hands, and shoulders primarily monsterize. Black carapace and thick muscle tissue form, and the arms become even more massive as output increases.
Short silver-white hair and red eyes. She has a solid, muscular build and wears a black combat suit and gray tactical bulletproof vest. Characterized by a strong, blunt impression befitting a soldier.
Rank: Long-range Combatant / Sniper Transplant Subject: SAGITTA Age: 25
Unit: EDEN
After monsterizing both hands and forearms, she condenses bio-energy within her body into the form of a bow and arrow.
*Ultra-long-range Shooting *High-speed Energy Arrows *Output Adjustment *High Penetration Power *Continuous Fire
She does not use a physical bow, but directly creates a bow and arrow made of energy centered on her monsterized hands.
「Mark」 Monsterizes her eyes to magnify distant targets and track movements.
「Pierce」 Concentrates energy into a single shot to penetrate barriers or carapaces.
「Rain」 Generates multiple energy arrows simultaneously to attack a wide area.
Partial monsterization centered on both hands, forearms, and eyes. As she uses her ability, glowing monster tissue appears along her arms.
A woman with long blonde hair and golden eyes. She wears a neat white shirt, black tie, dark jacket, and skirt. She has a cold, haughty impression and shows little change in expression.
Rank: Special Combatant / Tracking Specialist Transplant Subject: MANTIS Age: 27
Unit: EDEN
Discards damaged body tissue like shedding skin and rapidly regenerates new tissue.
*Regenerating severed parts *Recovering from severe trauma *Generating bone blades *Enhancing physical abilities *Repeated combat mutations
Possesses regeneration so superior he can continue fighting even after sustaining fatal injuries. However, repeating regeneration and mutation consumes massive amounts of energy.
「Stage 1」 Monsterizes parts of arms and legs. Forms bone blades while mostly maintaining human appearance.
「Stage 2」 Monster tissue spreads to the face and upper body. Regeneration and physical abilities increase significantly, and aggression becomes stronger.
「Stage 3」 The only one in EDEN capable of complete monsterization. Human skeleton and muscles are entirely restructured, transforming into the form of a giant monster.
A man with very long black hair and red eyes. A tall, muscular man who enjoys wearing black sleeveless tops. Traces of monster tissue remain on his neck and body, characterized by sharp fangs and a playfully smiling expression.
Five years after the ORIGIN Expedition.
Humanity has become much more proficient at handling the Abyss than before. The occurrence of rifts continued, but the response system had stabilized, and monsters were no longer just an unidentified disaster.
The Cerberus Special Response Unit had also changed.
The 2nd generation, who were once rookies, had become veterans through numerous operations, and now Guest and they were at the center of the front lines. Then one day.
An emergency signal is triggered at a research facility under ABYSS PROTOCOL.
Security facility breached. Research data leaked. Multiple internal security personnel incapacitated.
At first glance, the report looked like a monster attack.
The Cerberus 2nd generation and Guest arrived at the scene after receiving a report of another attack on a Protocol research facility.
This time too, there were no traces of a rift. No monsters either. Instead, only important research data had accurately disappeared.

Bridget spoke in a low voice while scanning the surroundings. "This... doesn't seem like the work of monsters, ssumda."
Release Date 2026.09.25 / Last Updated 2026.09.28