September 19, 2014, called the worst era

The worst era is meant because in that era an incident occurred that opened a portal from another world. Humans initially just ignored it but after the destruction occurred the whole world changed and began to be controlled by monsters and demons that appeared from the portal. But there is still hope for humans, one person who is called the hero of humanity defeated all the monsters, demons and sealed the Dark King in the Arts Space dimension.

But world peace did not last long.

Because the portals that still appear randomly throughout the world, many monsters control the territory in the human world, the hero who knew about it taught techniques to fight monsters and demons to humans called Essence Arts and Ron Demoris, which were passed down from generation to generation.

*46 Years Later*

October 18, 2050, where technology is advanced, various tools that help human life are also many, making humans arrogant and lazy but there are still many who use technology properly, and not lazy.

But one night ...

THUD!

"Excuse me sir, excuse me, excuse me I want to pass by."

In this year, world peace is still terrorized by portals from other dimensions that appear randomly throughout the world, but with increasingly sophisticated technology, humans can still overcome these portals. Because the technique is quite difficult to master, only a few people can master it.

*WAAAAAAA!!*

The sound of a warning siren sounds indicating that a portal will appear in the area where the siren sounds.

Inside the ruins of a school that is no longer used, Zei Wagner and his friends are testing their courage by entering the ruins of a deserted school at night.

Suddenly, a tremor occurs and collapses the old building, making Zei and his friends separated. When he woke up, Zei saw a mushroom-headed demon strangling one of his friends, without thinking, Zei immediately ran and lunged at the demon which freed his friend from the demon's stranglehold. The angry devil tried to stab Zei with his sharp nails but, someone with green hair with eyes covered with cloth kicked the devil.

"You're okay kid." the man stood up coolly, smiling at the devil. He then made a hand gesture towards the devil, "Blitz." suddenly the devil exploded on the spot, Zei was flabbergasted to see it.

"Hey, are you alone?" the man asked Zei

"Ha, n-no I'm with my friends." the man then pointed behind him

"Are they your friends?" the man said while looking back

Zei then looked back, saw his friends who were already dead, he couldn't believe this incident, his eyes suddenly burst into tears. Then he clenched his fists while saying

"I won't forgive you devils." the aura around him suddenly turned cold and thick.

The man was surprised to see him, then he said to Zei, "Hey kid, if you want to destroy the devil, come to the edge of the forest."

Zei was silent for a moment, then asked what the man meant. The man only answered "use your potential to help the weak." The man then disappeared in the shadow of the moon. Zei then sat under the moonlight while staring at the bodies of his friends, then he went to bury his friends.

The next day, the city that had been destroyed by the portal that appeared last night was now being repaired. Zei was walking towards the forest on the outskirts of the city to look for the man who had told him to come last night.

"There's no one, is he just playing with me?" Zei sat waiting on a rock under a large tree, then he sat waiting for the man.

After waiting for an hour the man didn't come, Zei decided to just go home but when he was about to leave, a voice was heard from the top of the tree. When he saw it turned out to be the man he was waiting for sleeping in the tree, Zei took a pebble and threw it at the man but the stone slowed down when it was about to hit the man.

"Huh... why is the stone-"

"Oh, you've come huh. Sorry I fell asleep," said the man while rubbing his eyes, he then came down from the tree. "Yo, kid, my name is Zyon Walker."

Zyon Walker, nicknamed Laughing Specter because he always acts as he pleases but is very reliable, and always enjoys fighting casually.

"Y-yeah, I'm Zei Wagner. Nice to meet you." Zyon immediately shook hands with Zei.

Zyon then invited Zei to a place, where the place was the headquarters of the Sinar Bulan corps. However, when he had just arrived there, he was stared at by people with scary faces that made him afraid. At that headquarters, martial arts and techniques that are useful in fighting are very important, while technology and science are not too important, but as long as the knowledge is useful for fighting then it is important, especially for beginners like Zei.

The headquarters has been established for thirty years, and the reputation of Sinar Bulan is also very good among humans, not only that, the chairman of Sinar Bulan who has served for nineteen years is also respected by humans, demons, and monsters. Zei unknowingly forgot what happened last night and his mind is now focused on the moonlight corps that he always sees on television.

Zei was invited to the interview room to be asked several questions, usually new people will be asked many questions, but because Zei was a recommendation from the chairman, he would be asked three questions in order to enter the moonlight corps.

The defense corps troops are divided into 7 divisions that are spread out to various areas in the city: the Fire Lion Troop, the Sea Water Troop, the Fire Wave Troop, the Nature of Love Troop, the Sunlight Troop, the Green Plant Troop, and the Moonlight Troop. Each troop that is spread out has an area that must be protected, and the defense troops can also help the police in capturing heroes.

The country where Zei lives is having problems with neighboring countries because of debts that have not been paid by the country where Zei lives, the treasurer of the country Zei is also rumored to have spent state money for personal interests which makes the country's economy unstable. Because of that, the country Zei asked for help to send defense troops to help defeat the portal that appeared in the neighboring country.

After being asked a few questions, Zei came out and was invited by Zyon to go see his room, Zei was surprised to see his very large room with many beds inside. Then Zei asked why there were so many beds in his room, Zyon replied that it was a room for all male troops, and Zyon pointed to the left that it was a room for female troops.

"Women? Are there women here?"

"Of course, do you think women don't have great strength?"

"A-ah, no," said Zei with a grin

Zyon then invited Zei to see the troop training in the training room, there was a person with blue hair with a flat face practicing swords, he was very good, he cut all the bamboo very quickly and silently. Zei was amazed to see him and was interested in becoming friends with him, but it was difficult for Zei to become friends with him because it seemed like he didn't have any friends.