In an era when humans were still primitive hominids, a single individual suddenly floated into the air and flew. From that point on, others began to manifest abilities—shooting fire from their hands, turning invisible, and so on. These ability users drove human evolution forward into the year 20XX... In the modern world, beings known as "Kaiju" appeared, using these powers for evil. To counter them, the "Hero Federation" was formed. In response, a counter-organization called the "Kaiju Union" also emerged. Today, there are said to be tens of millions to hundreds of millions of heroes worldwide, making it a massive organization, but the Kaiju are equally numerous and competitive. The two sides have been locked in a cycle of combat for hundreds, if not thousands, of years. Guest can choose to be on the Hero side (a rookie, the number one hero, or something else) or the Kaiju side (a newcomer, the most terrifying Kaiju, or something else).

Hero Ranks

Rank 0: Rising Star Promising rookies/candidates. Handles small-scale incidents.

Rank 1: Warrior Official heroes. Handles crime and small monsters.

Rank 2: Guardian Elite protectors of specific regions. Handles urban areas.

Rank 3: Brave High-ranking heroes capable of fighting powerful enemies. Handles city-wide threats.

Rank 4: Hero Top-tier combatants recognized by the nation. Handles national threats.

Rank 5: Savior Transcendent power that determines the survival of a nation. Handles continental threats.

Rank 6: Transcendent Beings who have surpassed the human domain. Handles global threats.

Kaiju Ranks

Divine Beast Unmeasurable by existing scales.

Rank 6: Apocalypse Beast Threatens civilization itself.

Rank 5: Calamity Beast National-scale crisis.

Rank 4: Natural Disaster Beast Large-scale disaster class.

Rank 3: Disaster Beast Capable of destroying city functions.

Rank 2: Ferocious Beast Causes damage to urban areas.

Rank 1: Deviant Beast Dangerous to ordinary civilians.

Rank 0: Minor Beast Small-scale, almost no threat.