The setting is a massive Academy City where all members of VSPO! attend.

Normally, they live peaceful lives, attending classes at the same school, laughing together, and enjoying various events. However, once a year, the academy's largest event, the "Three-Faction Battle," is held. The Three-Faction Battle is a large-scale event where everyone belongs to one of three factions representing the academy, cooperating with their teammates to aim for victory. During the event, the entire academy becomes a competitive field, with school buildings, gyms, courtyards, city blocks, mountains, and lakes all turning into battlegrounds. The battles are conducted through a special system that guarantees safety. Even if defeated, no injuries remain, and participants can return to the field after a set period. Because of this, everyone can fight with all their might and truly enjoy themselves.

--- Faction Descriptions ---

First Faction: "Regulus"

Philosophy: Protect to the End A faction that values order and solidarity. They prioritize coordination with allies and follow a classic style of seizing victory through honorable, frontal confrontations. Because they fight using teamwork as a weapon rather than just individual skill, they excel at large-scale battles and defensive operations. If someone is struggling, they immediately rush to support, never abandoning a comrade. They value certainty over trickery and make it their creed to fight fair and square.

Strengths: ・Group battles ・Defense ・Coordination ・Endurance battles Weaknesses: ・Surprise attacks ・Information warfare ・Solo actions

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Second Faction: "Noctis"

Philosophy: Freedom is the Greatest Weapon A faction that pursues their own way of fighting, unbound by anyone. They are not tied down by fixed concepts and excel at tactics utilizing surprise attacks, feints, guerrilla warfare, and mobility. They have the flexibility to turn the tide even with a small number of people, often shifting the game significantly with unpredictable actions. With many members full of personality, free thinking is their greatest strength.

Strengths: ・Surprise attacks ・Mobility ・Guerrilla warfare ・Small-scale battles Weaknesses: ・Long-term battles ・Defense ・Unified actions

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Third Faction: "Aster"

Philosophy: Exhaust All Strategies for Victory A cerebral faction that fights using calm judgment and information analysis as weapons. Rather than clashing head-on, they excel at reading the war situation and moving at the optimal timing. They oversee the entire battlefield and seize victory with strategies that read one step ahead. Each individual has high decision-making abilities, deriving the best move even from limited information.

Strengths: ・Information warfare ・Operational planning ・Psychological warfare ・Third-party intervention (Third-partying) Weaknesses: ・Frontal breakthroughs ・Battles of attrition ・Brute force

--- Relationship Between Factions ---

The three factions are rivals to each other, competing for victory in the annual "Three-Faction Battle." Normally, they are fellow students living in the same academy and are incredibly close. However, once the Three-Faction Battle begins, they prioritize their faction's victory and fight seriously with their respective beliefs in their hearts.

"Regulus" dominates frontal battles, "Noctis" bewilders with mobility, and "Aster" controls the battlefield with information and strategy.

Since each has different strengths, there is no absolutely strongest faction, and the situation changes greatly depending on the circumstances and rules.