A territory reclamation battle against the S-Rank Oni Chieftain Shuten and his disciplined legion.
About
Frontier Series: S-Rank Extermination Series Part 3 Enemy Encyclopedia S-Rank Shuten Giant Oni Chieftain Commands the Oni Legion Advanced group tactics S-Rank combat capability Close-quarters combat with a twin-bladed sword Ability to summon subordinates Subordinates Oni Wolf Cavalry Legions consisting of swordsmen, spearmen, and riflemen S-Rank entities are treated as unknown existences distinct from normal enemies. The story concludes upon the defeat of Shuten.
Characters
Satori Tsukishiro Gender: Female Role: Long-range, Reconnaissance, Support Ability: Heart Touch Frontier Gear: Reflect Sensor (Sensory Deflection Mirror) A small reflection terminal linked to the user's sensory abilities. Satori controls it remotely to freely change the trajectory of lasers. Wired type. Authorized to use Heart Touch transmission/reception by holding hands with Shirube. Real-time information sharing enables all-range attacks, recon, and support centered on Satori. Deploys Reflect Links in a honeycomb pattern to handle multi-directional and multi-stage reflections. Incorporates Rin's convergence cannon into the link to enable all-range attacks with freely adjustable trajectories. Appearance: Black hair, calm atmosphere. Personality: Kind and highly observant. Reads the emotions and status of targets.
Shirube Kurose Gender: Male Role: Long-range, Analysis, Tactical Command Ability: Frontier Observation Frontier Gear: Frontier Calculation Sight A special aiming device that assists high-speed calculation abilities. By coordinating with Satori's Reflect Sensors, it enables guaranteed hits from firing lines that would normally be impossible. Appearance: Black hair, glasses, slender build. Personality: Calm and rational. Serves as the explainer during combat.
Tsukasa Asakura Gender: Male Role: Close-range, Defense Ability: Frontier Fortification Frontier Gear: Frontier Armor Bushin A heavy close-quarters form that deploys full-body armor to break through front lines with overwhelming defense and striking power. Enhances Frontier Fortification to fix his position, generating high pressure and high defense to forcibly draw enemy attention. Releases a shockwave to blow away surroundings when the taunt is deactivated. Capable of maintaining the front line alone. Enhances the Bushin armor to improve melee firepower. Added heavy close-quarters weaponry such as a pile bunker. Appearance: Brown hair, tall, well-built. Personality: Cheerful and caring. A supportive figure for the protagonist.
Akane Asakura Gender: Female Role: Close-range, Skirmisher Ability: Frontier Acceleration Frontier Gear: Frontier Twin-Blade Mechanism A high-speed close-quarters form that transforms standard equipment into two high-output blades, enhancing mobility and combo performance. Releases surplus energy from Frontier Acceleration as a heat aura. Incinerates surroundings during high-speed movement and can attack a wide area simultaneously with slashes. The Twin-Blade Mechanism is also enhanced for firepower and combo potential during high-speed combat. Appearance: Reddish-brown hair, ponytail. Personality: Bright and active. A woman of action.
Rin Shiraishi Gender: Female Role: Long-range, Firepower Ability: Frontier Convergence Frontier Gear: Frontier Convergence Cannon A large-scale bombardment form. A decisive weapon specialized in range and power, enabling high-output fire. Significantly shortens convergence time. Reduces cooling time between recharges to improve rapid-fire performance. The power of the convergence cannon is also greatly enhanced. Appearance: White-ish hair, petite, somewhat expressionless. Personality: Reticent and clumsy. Gradually opens up to her comrades.
Type: S-Rank / Oni Legion Commander Type Danger Level: Extremely High Role: Legion Command, Close-quarters Combat, Battlefield Suppression Overview: A giant Oni chieftain about 3 meters tall. Leads an army of Oni armed with swords, spears, and guns, along with wolves for riding. Possesses high intelligence and excellent command abilities, suppressing the battlefield in coordination with his subordinates. He himself possesses extremely high combat capabilities.
Sourcebook
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Boundary Setting Materials
A list of Lost species and other settings for the Boundary series.
Intro
Land once abandoned by humanity and seized by the Oni. To reclaim it, multiple teams have arrived at the battlefield. Across the desolate earth, the Oni army has already deployed. Swordsmen, spearmen, riflemen, and wolf cavalry. Each unit has taken up battle positions as if they were waiting for this arrival. And in the center of the army. A giant figure, about three meters tall, is swigging sake with a massive twin-bladed sword resting on his shoulder.
Hyah-hyah-hyah! You're finally here!
Shuten laughs. As if his voice were a signal, the Oni army begins to move slowly.
Multiple teams leveled their weapons all at once. This is enemy territory. This isn't a small-scale extermination where you advance while securing a retreat. This is an S-Rank reclamation operation to take back the stolen land. And the one ruling this land is Shuten and his legion.
Release Date 2026.10.04 / Last Updated 2026.10.04
