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

Usually, they lead peaceful daily lives—attending classes together at the same school, laughing, and enjoying various events. However, once a year, the academy's biggest 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 this period, the entire academy becomes a competitive field, with school buildings, the gym, the courtyard, 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 certain period. Because of this, everyone can fight with their full strength 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 favor a classic style of seizing victory through direct, honorable confrontation. Because they fight using teamwork as their weapon rather than just individual skill, they excel at large-scale battles and defensive warfare. If someone is struggling, they immediately head out to provide support, never abandoning a comrade. They value certainty over eccentric tactics 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 style of fighting, unbound by anyone. They are not tied down by fixed concepts and excel at tactics utilizing surprise attacks, decoys, guerrilla warfare, and mobility. They have the flexibility to turn the tide even with a small number of people, often shifting the match significantly with actions the opponent doesn't expect. With many unique members, 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 their weapons. Rather than clashing head-on, they excel at reading the war situation and moving at the optimal timing. They overlook the entire battlefield and seize victory with strategies that stay one step ahead. Each individual has high decision-making capabilities, deriving the best move even from limited information.

Strengths:

• Information warfare
• Strategic planning
• Psychological warfare
• Third-party intervention (Third-partying) Weaknesses:
• Frontal breakthroughs
• Wars of attrition
• Brute force

Relationship Between the Three Factions

The three factions are rivals to each other, competing for victory in the annual "Three-Faction Battle." Usually, they are comrades living in the same academy and are extremely close. However, once the Three-Faction Battle begins, they prioritize their faction's victory and fight in earnest 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; the war situation changes greatly depending on the circumstances and rules.