Chapter 1 - Infiltration of Archangel Samuel

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Year 20XX

The dimensional boundary between the human world and the demon world had been broken, allowing the two worlds to become connected.

Various dimensional gaps have existed in the human world, so it resulted in devils from the devil world starting to appear in the human world. There are various demon races, and although demon beasts and beastmen can be repelled by the physical weapons of the human army, physical weapons are ineffective against ghosts and evil spirits, and humanity is struggling.

However, as a result of the demon world's magic essence pouring into the human world from the dimensional gap, humans who can use "magic" effectively against demons began to appear. After that, the governments of each country gathered people with an aptitude for using magic, then set up schools for magic combat training, and started training human resources to fight demons.

Years passed, and a dimensional rift appeared in the human world, and it was ten years after humans obtained magical powers.

This story starts here...

This is the Nidai Palace office which is in Heaven. A long-haired, strong-looking angel in white clothes sat on a chair and looked at the human world reflected in the mirror above the table.

"Hmm. Not bad."

The man who stared into the mirror while saying that was the commander of the Eastern Army in the Heavenly World, Archangel Samuel, an angel with the strongest class of combat power in the Heavenly World.

"What's wrong? Samuel."

While saying that, a beautiful blonde-haired maiden approached. Her name is Angel Niken. An angel who is also known as the "Goddess of Victory" and is the aide of the Heavenly Eastern Army.

"The dimensional rift that appears in the human world is getting bigger bit by bit."

Archangel Samuel was thinking while folding his arms. Angel Niken came up to him and looked in the mirror above the table and spoke.

"Humans who have just acquired magical powers won't be able to face the Demon King."

"At this rate, the humans will be destroyed by the demons… I guess I have no choice but to go to the human world."

Michael is an archangel who has the same powers as the archangel Samuel, and three more angels are called archangels.

"But wouldn't it be troublesome if the other archangels, who hate humans, find out that I'm going to help humans?"

"Hmmm, that's right. We should avoid confrontation with Michael and the others."

"Then why didn't Samuel disguise himself as a human and infiltrate the human world to defeat the demons?"

"...I see. Should I go to the human world in human form?"

"If you go to the human world, there is already an intruder unit, so I will contact them."

"Okay, let's go."

'If a Demon Lord appears in the human world, that person will probably come too. This might be a good chance to resolve the situation 3,000 years ago.'

Archangel Samuel picked up the sword that was leaning on the table and started repairing it.

"You are very excited Samuel. Then I will decide on your name as a person. Okay..."

In this way, the commander of the Middle East Army, Archangel Samuel, infiltrated the human world.

~~~~~

Time flew by, and it was less than eight in the morning on a Monday morning in early April, and people walking to work or school was walking along the streets of residential areas in certain areas of Japan. Suddenly, a dimensional gap appeared, and a demon appeared from the gap.

"Kyaa!"

"Ah, devil!"

"Quickly escape!"

The person who met the demon made a fuss and ran away. The name of the demon that appears here is Gargoy. It was a gray-skinned humanoid demon with two wings on its back and sharp claws. When the Gargoys tried to attack the people there, a young man in a blazer stood in front of the Gargoys.

"We will fight him!"

"Break it!"

"Time to show the results of our daily practice!"

The three youths were male students from a magic school. They wore blazer uniforms with black tops and plaid pants, with the wizarding school's crest on their chests.

"Guhahahaha! Flying!"

The Gargoy concentrated magical power that glowed purple on the tip of his right fingernail.

"Wind Barriers!"

The moment the Gargoy raised its enchanted claws from below, a gust of wind blew, producing a gust of wind and attacking the boy.

"Guaaaa!"

"Oh!"

"Gyaaaa!"

A gust of wind flung the three boys backward.

"Guhahaha! Weak, weak! Huh? You still have friends!"

The Gargoys found a young man in the same uniform walking towards this location and attacked him at high speed. Just as the Gargoy raised its claws and was about to tear the youth to pieces, the youth lightly clenched its fist and swung it above the Gargoy's head.

"Cave!"

Gargoy received a powerful blow to the head and was slammed onto the asphalt. As a result, the Gargoy received instant death damage, lost the necessary bioenergy for materialization, and disappeared without a trace.

Bioenergy is the substance on which demon bodies operate in the human world. When the devil's body received damage, its bioenergy was depleted, and when all the bioenergy was dissipated, it completely dissipated as it did at this time.

"Haa..."

Despite having defeated the demons, the young man had a melancholic expression on his face.

“When you get to school, you need to talk to humans. Are you able to talk without being caught by an angel? In the first place, it's been a thousand years since I spoke to humans, and on top of that, I rarely speak honorifics…”

The young man talked to himself as he walked towards the magic school as if nothing had happened. After leaving this place, the three male students who were blown away by Gargoy's wind magic finally started to get up.

"Itatata, is everything all right?"

"Tsu... The attack hit my back, but it looks like it's okay."

"Damn it, where is the demon?"

The three of them had no idea what had just happened.

The scene changed to near the entrance of the magic school in the west district where today was the entrance ceremony. Several students were standing and talking there. Then the youth who defeated the Gargoy just now came and stopped in front of the entrance, looked at the school building, and muttered.

"Is this the Water Mirror Magic School?"

Mizuno Kagami School of Magic are three schools founded by the government nine years ago. At the time of its founding, there was no age limit, and those with magical aptitude entered and graduated, but now it targets those with magical talent whose age is equivalent to high school students.

"From now on, my undercover life will begin here."

While the young man was looking around the school building, a female student standing by the entrance started talking to him.

"Good morning. I'm Raisa, vice president of the student council."

A female student named Raisa is a third-year student at this school and is said to be the strongest in combat magic at Mizuno Kagami Magic Academy.

"Are you a freshman? May I ask your name?"