My Girlfriend is an S-Class Adventurer

"Oops, I guess I'm late for the dance? I don't need an invitation, right?"

Illuminated by a beam of light created by the giant door in that infinite dark, a girl of medium height smiled sarcastically. She had very orange hair and a yellow streak that stood out in her bangs, but in reality, what was most striking about her were the two horns sticking out of the sides of her head, both slightly red.

"Who are you!?" The shadow shouted, angry at having its possession curbed.

"Ah! I'm sorry for being so rude!" The girl exclaimed, bringing her right hand up to her mouth. "Hello, demon! My name is Vye Agra. And what's yours?" She said with a very cordial smile.

'Demon? What do you mean!? Wait... Vye Agra? Isn't that the name of that blue potion that's been selling well recently, to help with... Never mind. Focus, Luke.'

When the mysterious girl asked the demon's name, the creature took a few steps back. As a result, the girl shortened the distance between the two in a second. Then, as particles of electricity crackled in the air, she appeared in front of him and struck him with a shiny, transparent gauntlet.

This gauntlet did not appear to be expected. It coated the girl's entire forearm and also managed to inflict damage on the demon, who was thrown into the darkness.

Throwing her hair back and undoing that gauntlet, the girl turned to Luke, who was barely standing, "Can you still go on?" She questioned him seriously.

The half-wolf looked at her and nodded, frowning as he looked out into total pitch. At that moment, it didn't matter to him who she really was because he already owed her a huge debt.

"That's nice." The girl spoke and smiled understandingly. Soon after, she turned to look in the same direction as Luke was looking. "You seem to have good instincts, but know that there are only two ways to defeat a demon: seal it or pronounce its name. I can seal him, however, he is still strong, we need to weaken him by punching him in the face a few times."

Still holding the Black Egg, the half-wolf corrected his posture, inhaled, and sighed. As soon as the compressed air left his lungs, he heard a fast sound coming toward him.

"To your left!" Luke shouted, directing the attention of the girl, who didn't seem to notice.

"Thank you! <Fist of Life>!" She shouted, and then her right fist glowed as before. However, this fist multiplied dozens of times so that it managed to completely block the demon blow, which was a giant black hand.

The shadow, hidden in the darkness, attacked again with dozens of arms, which seemed to appear from all corners.

The girl also had no trouble blocking all the attacks, using only her natural speed and the first gauntlet technique.

While being protected from that gale of blows, Luke realized he was on a level far below the two, yet he didn't want to leave all the responsibility on the young girl's back, so he focused all his senses on trying to locate the monster in the darkness.

At first, he only heard the collision of blows and defenses going on around him. However, soon everything turned into a mere annoying noise, and although it didn't emit any sound, the demon's rotten odor was concentrated in one place.

Taking advantage of the gap of opportunity that the girl was providing him, Luke this time, focused tightly on the <Vind> skill, and the moment he felt able, he raised the index and middle finger of his left hand.

FLOOOSH! A supplied wind tore through the black world, swift as an arrow.

"Urgghhh! Bastard!" A voice reverberated throughout the compound. "You're going to pay for this!"

"No, no! I'm going to do what I should have done already!" The girl shouted and took advantage of the demon's moment of distraction to use the <Divine Blast> skill.

A blinding glow appeared after she raised her left arm, forcing Luke to cover his eyes. Next, a squeal of attacks could be heard:

"Wretcheeeeed!!!" The demon shouted, with a much thinner tone than usual.

When the half-wolf opened his eyes again, he saw the black world in shards, like a window glass breaking apart.

From the holes created, Luke realized that the exterior was familiar to him and it looked very much like the cave where the giant white cube was, yet that object wasn't there. Otherwise, its glow would be readily noticeable.

Behind the half-wolf, there was the door through which the powerful girl had entered to help him, the same one that now looked very much like the giant door he himself had opened earlier.

"What just happened?" Luke questioned, fascinated and lost at the same time.

"This is the ruin of the Demon Domain. A room where he makes the rules and manipulates reality as he wants." As the dark world fell apart, the girl explained the situation to Luke.

'So, I was trapped in a separate world?' The half-wolf dared not ask any more questions in that situation, and after a few seconds, a thick voice boomed throughout the cave.

"I didn't expect to find a veteran paladin in such a... insignificant town." The demon's tone was a mixture of contempt and anger, and when it finally revealed itself again, Luke was able to measure its strength only based on its fearsome appearance.

At least five meters tall, the demon appeared in the blink of an eye. Although it had white skin, the monster was still macabre with several horns protruding from its head, as well as from its back. Its fibrous muscles were sewn together by stitches made of steel.

"Will you stop forcing that thick voice? It doesn't suit your mediocre race." The girl teased him.

However, one thing caught the half-wolf's attention more than the creature's appearance or voice.

Between the demon's giant legs, there was a sword amidst many rocks. Thanks to the golden handle that copied the head of a dragon, Luke could recognize that that was his sword, so he dropped the Black Egg next to the girl and said:

"Cover me, please."

Before she could question his action, Luke ran toward the demon.

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