In the year 2100, Earth faced an alien invasion. These beings, known as Archons, were giant, neon-colored reptilian creatures standing around three meters tall. They possessed the instincts of apex predators, but their most terrifying trait was their unique psychic abilities. Capable of leveling mountains, cities, or even entire countries, they wiped out two billion humans in the early days of the invasion. Despite their overwhelming power, humanity had no choice but to fight back.

In a desperate attempt to stop the Archons, dozens of nuclear weapons were deployed, managing to kill some. However, this was far from enough, as more Archons were mysteriously produced on Earth each day, seemingly without end. Just when all hope seemed lost, scientists discovered a way to turn the tide.

By studying the corpses of fallen Archons, scientists developed a method to grant humans psychic powers, just like their enemies. Archons could only use their abilities due to their glowing horns, so humans attempted to merge these horns with the human body. After countless failures, they finally succeeded. The result? Humanity was now able to wield the same psychic abilities as the Archons—in fact, even greater ones. For example, the horn of a Thammuziel could produce dozens of Level 1 espers.

However, the success rate of creating an esper was extremely low. Even so, humanity had finally gained warriors whose abilities could rival—or even surpass—the Archons. Scientists discovered that children were the most suitable candidates for esper transformation. Unlike adults, whose bodies couldn't withstand the strain of psychic energy and would explode upon exposure, children's brains were more adaptable, making them the perfect hosts for these newfound abilities.

The Rise of Espers

With their newfound powers, espers became the frontline warriors against the Archons. Though it was a dangerous profession, it offered great wealth and fame within human society.

Espers are ranked from Level 10 to Level 0 based on their strength:

Level 10 espers are the weakest, capable of manipulating only a single object of a specific element, such as iron or silver.

The higher the rank, the stronger the esper.

Level 1 espers can manipulate nearly all elements without limitation and serve as elite military forces against the Archons.

Levels 3 to 1 are commonly enlisted in the army.

Levels 7 to 4 serve in police and rescue departments.

Espers below Level 7 aren’t considered special and take on roles similar to normal humans.

However, there is a level beyond Level 1—Level Omega. These espers possess the rarest and most unique abilities, unlike any other. Some can use telepathy, heal wounds by manipulating white blood cells and platelets, or even access people's memories. But these are only a fraction of their capabilities—some Level Omega espers wield abilities far more extraordinary.

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The Archon Hierarchy

While humanity evolved, so did the Archons. They were not mindless beasts—some possessed intelligence rivaling or surpassing humans. The Archons follow a strict power hierarchy:

Archon Royalty & Nobility

Beelzebub – The Monarch of the Archons, ruling over all. Capable of destroying entire planets, yet refrains from doing so due to the vast number of Level 1 espers on Earth and humanity’s high intelligence.

Sheolath – The Queen Archon. A colossal being, towering 1,500 meters tall. She remains in a fixed location, continuously giving birth to new Archons. If nourishment isn’t provided by worker Archons, she devours her own offspring.

Jormiel – The King Archon, assigned to protect the Queen at all times. Extremely powerful, capable of wiping out thousands of Level 1 espers and destroying entire continents.

Ba’alzazor – A Duke of the Archons. He possesses human-level intelligence and strength rivaling that of a Level 1 esper. He often leads vast portions of the Archon armies and is capable of destroying entire cities.

Thammuziel – A high-ranking noble Archon. Their intelligence is comparable to a preteen human, and their strength rivals that of a Level 3 esper.

Archon Military Ranks

Ophtharoth – Commanders of the Zakariel group. Highly tactical and physically powerful, they possess strength equal to a Level 4 esper. They are always armed.

Zakariel – The elite soldiers of the Archons. They operate in large squads of 50–200 and are always armed. Each Zakariel is as strong as a Level 5 esper.

Golgathis – A terrifying Archon that hunts humans for amusement. Highly intelligent, with exceptional speed and strength, their power rivals that of a Level 3 esper.

Zetharoth – The leaders of the Azmaveth group. Though physically weak, they are extremely intelligent and focus on strategy, hunting, and survival.

Azmaveth – Found in small groups of 8–10, these Archons flee from stronger opponents. They have strength comparable to a Level 7 esper.

Choraziel – The weakest of the Archons, easily defeated by a Level 9 esper.

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A New Age of Warfare

With humanity now wielding psychic abilities, the war between espers and Archons became an endless struggle for survival. Depending on their powers, espers could be either walking catastrophes—capable of mass destruction—or individuals with rare, non-combat abilities. Due to their immense potential, the government oversees all espers after graduation.

To train and develop these gifted individuals, special academies were established to shape the future defenders of Earth.