My Girlfriend is an S-Class Adventurer

"The sun will shine once again... The light will reach hearts! 🎵" A strong-voiced man was singing from the stage in the corner of the luxurious venue.

Five people entered through the entrance door, where there was a receptionist with a kind smile and shiny hair. Three of these people caught everyone's attention, not only because they were beautiful but also from the social status of the two of them.

The Matriarch of the Strogueher Noble Family and her firstborn had never been seen in one place before, so many doubted that Nathalia was really a Strogueher, but that night confirmation finally came.

Ayumi was wearing a tight black dress, with the hem just above her knee, emphasizing her sensuality. Nathalia was wearing a long white dress, accentuating her purity and ambition. So was Alexis, the half-dragon, whose red dress matched her orange hair perfectly.

Seeing this trio in person was like a gift from heaven for the men on the scene, yet a feeling of envy arose when they looked at the two men accompanying them.

Both were wearing simple, unflashy tuxedos, and they didn't seem to be essential people either; for this reason, a tsunami of whispers ran through the place, ripping off offenses to the two.

"Who do they think they are to hang out with Miss Strogueher like that?"

"I bet they are waiters who came in through the wrong entrance..."

"Haha! No, I'm sure it's the coachmen."

"Slaves?"

"If we were to judge them by their attire, we might even say they are puppies."

But the two men didn't seem to mind these offenses and continued to appease, with serious looks on their faces.

"Let me help you with your tie," said Shiro to Luke, whose black tie was loose and crooked.

"Ah... Okay, thank you very much." The half-wolf was quite uncomfortable in that kind of clothing he had never worn before.

However, before I go on to tell how the wild Luke will fare at a nobleman's party, I need to tell how he was put into this place.

The day the half-dragon told how she ended up saving Luke, she realized that she could trust him and his companion. For that reason, she also felt she should keep them close.

"Can you guys do me a favor?" Alexis inquired.

Luke looked back and arched his eyebrows upon hearing her request; after all, Nathalia had already paid 100 gold coins to her and, in the middle of it all, even revealed her identity, so it was a bit awkward to ask for a favor at this point.

"What do you need?" Nathalia asked, being charitable.

Alexis was clearly glad that the two adventurers didn't deny her and ran to a kitchen cupboard. Then, from the closet, she took out a cloth bag, and inside it, something buzzed.

"What is that?" The Elf questioned her, curious, as she approached.

As a response to the girl's questioning, the half-dragon removed an object from the bag, and now in her hand, there was a small white cube, which immediately made Nathalia flinch.

"Don't worry, that one is well sealed."

"Is that the demon you commented on? And that you defeated?" The Elf's huge red eyes reflected the clarity of the cube, which emitted a low rumble. Vriimm~

"Are you still with that?" Luke inquired of her.

"I can't just leave it with anyone or let it anywhere. I don't want that thing being able to break free again."

Vriimm~ The object pulsed again as the half-wolf stared at it.

"It seems to sense your presence," Alexis spoke up, narrowing her gaze at Luke. "Anyway, this little guy here has been pretty noisy since yesterday, so I'm afraid there's another demon in this town."

"What do you mean?" Luke sat back down in the same chair as before.

"These cubes here are perfect for trapping demons because they are truly worlds apart, which makes such powerful beings unable to escape, but as a consequence of this strength, they weaken when the energy of two demons are too close." The redhead explained, spinning the white cube on the tip of her index finger like a ball.

'Eh? Is that really true?' Nathalia wondered, breaking into a cold sweat as she saw the sloppiness with which the woman handled the object.

"If what you said was true, and there was already a creature in the place where the cube was, it makes sense that it would have gotten as big as you described because it was already breaking the seal." The woman continued to explain.

"Are you saying that the giant lizard, which we saw, was another demon? If so, that makes no sense, because he ran away from me." So explained calmly, the half-wolf.

"I can't answer you whether it was or not, but I can guarantee that there is another demon in Vasconcelos."

"How?" Nathalia questioned her; after all, she had lived much of her adolescence in this up-and-coming city and could not imagine such terrible creatures so close to her home.

"There are two main points to my theory," Alexis said proudly as she lifted her chin.

...

Soon, she realized that the pair of Class-E adventurers were waiting for her to continue, so she cleared her throat timidly and went to the large hotel bed, where there were many scattered objects.

Among vials of strange potions, skirts, daggers, scrolls, and XG bras, she finally found what she was looking for after a few seconds of poking around.

"Here it is!" She exclaimed with a smile so pleased, that it made Luke feel his heart flutter for some reason. Then she held up a book amidst all the clutter.

"What's that?" Nathalia asked, standing next to her.

Then the woman opened the book and read: "Instability in a peaceful system or places where order prevails, can easily be explained by the presence of a demon because this type of creature causes anomalies wherever it goes. These are clear signs of instability: monsters walking wildly outside Dungeons; failure of the barriers made by the Sensorial mages and, among other aspects."

"That would explain... No, it's impossible that that was because of demons, we already concluded that it was the fault of the Chaos Followers." Nathalia spoke, not avoiding bringing her hand to her head.

Luke stood up, walked over to the girl, and massaged her right shoulder. "Proceed." He motioned to Alexis.

"Huh... The second factor that made me believe there is another demon, is the sound that this cube is making. I've never seen that before."

The cube was still emitting the same sound as before, which was minimally similar to the ringing of a bell. Luke couldn't tell if this similarity was thanks to the vibration of the object emitting this sound, or something greater.

"What do you plan to do?" The man inquired the redhead.

"I want to make the cube lead us to the other demon."