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

Usually, they lead peaceful daily 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 allies to aim for victory. During this period, 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 time. This allows everyone to fight with all their might and have genuine fun.

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 warfare. If someone is struggling, they immediately move 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
• Wars of attrition Weaknesses:
• Surprise attacks
• Information warfare
• Solo action

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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, feints, guerrilla warfare, and mobility. They have the flexibility to flip the situation even with a small number of people, often shifting the tide of the match with unpredictable actions. With many members possessing strong personalities, free-thinking is their greatest strength.

Strengths:

• Surprise attacks
• Mobility
• Guerrilla warfare
• Small-unit battles Weaknesses:
• Long-term battles
• Defense
• Unified action

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Third Faction: "Aster"

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

Strengths:

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

Relationship Between Factions

The three factions are rivals to one another, competing for victory in the annual Three-Faction Battle. Normally, they are classmates living in the same academy and are incredibly close friends. 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 the frontal battles, Noctis bewilders with mobility, and Aster controls the battlefield with information and strategy.

Since each has different strengths, no single faction is absolutely dominant; the tide of battle changes significantly depending on the situation and rules.