[Reality] The Clan's Secret Art and His Fiancée Sister's Embrace
The sensation of crossing back through the dimensional gate into reality still sent a dizzying jolt through his brain. It wasn't that the flow of mana had been severed—only that the texture of the energy wrapping his soul had changed completely. If the mana of the Abyss was like blood-scented lava, thick and seething, then the mana at the heart of Seoul, South Korea, was like a shallow, quick-flowing stream, meticulously measured and controlled by the Hunter Association's monitoring systems.
Flicker, flicker. Along with the white glow of the ceiling fluorescent, the familiar air of his one-room apartment seeped deep into his lungs.
"...So I'm back."
Yushin slowly pushed himself up from the bed. In his dantian, the weighty C-rank mana he had earned in the Abyss lived and breathed intact, alongside the mana regulator fitted to his wrist and the pulse of the magic sword Black Moon, engraved into his very soul and sheathed at his hip.
Steadying his breath for a moment, Yushin picked up his smartphone and called his father, Go Hyeonseok.
Brrring, brrring. After only two rings, the familiar, weighty voice of a middle-aged man flowed through the receiver.
"Ah, Yushin. What brings a call at this hour?"
"Father."
Yushin swallowed once, then opened his mouth with resolve.
"I... have awakened."
A deep silence flowed from the other end of the line. It was not the silence of a man too stunned to speak—it was the heavy silence of someone accepting, and coming to terms with, the fact that the great wheel of destiny he had waited on for so long had finally begun to turn.
"...I see. Twenty-four, then. The gate opened later than expected. What unique ability manifested?"
"Dimensional Wanderer."
At those words, the silence stretched deeper and colder than before. After a stillness so long he half-wondered if the line had gone dead, his father's low, sunken voice returned.
"...The Dimensional Wanderer. This is not a matter to be discussed over some phone call. Come to the main house at once. As elder of this family, I shall verify it with my own eyes."
"Understood, Father."
When the call ended, Yushin stared at the black screen and let out a long breath. This was no longer a mere personal awakening, no simple success story of one hunter. The clan, the brilliant history of his ancestors, and secrets of his bloodline he had yet to learn were all surging toward him like a great wave.
He took a taxi to the main house—the Go Clan's grand traditional mansion, standing majestically in the heart of Seoul.
Creeeak, clack. The moment he opened the mansion's heavy door and stepped inside, his mother Yoo Jeongyeon's gentle voice drifted over from beyond the wooden floor.
"Oh my, Yushin's here? What brings you without so much as a call?"
His mother, approaching with a warm teapot in hand, stopped mid-step when she caught the look in her son's eyes as he stood rigid before the sofa.
"Your expression is anything but ordinary today. Is something the matter?"
"Mother. I've awakened."
Her hand froze in mid-air. The fingertips lowering the teapot onto the table trembled faintly.
"...Is that so? Then it's cause for celebration. So—what type of ability manifested?"
"Dimensional Wanderer."
In that instant, his mother's graceful eyes wavered violently. Her gaze turned to the aged framed print of a Goguryeo tomb mural hanging on one wall of the living room.
"...So it was that power. I knew it would be. Have you already told your father?"
"Yes. He summoned me, so I came straight to the main house."
His mother exhaled slowly and gently steadied Yushin's shoulder.
"I see... If you've awakened that power, then there are destinies of this clan that can no longer be ignored and brushed aside."
Fear, sorrow, and an inescapable resignation were all tangled together in her voice.
And that was the exact moment—
"Oppaaaa...!"
From the end of the living room hallway burst a voice so bright and sultry it made his heart drop straight through the floor.
Pitter-patter! With light footsteps, a beautiful girl with black hair bound in a high ponytail came darting out like an arrow. A white pleated miniskirt beneath a loose black oversized hoodie, springy honey-toned thighs on full display—she was Yushin's one and only biological younger sister, the clan's greatest genius awakener, the A-rank holy maiden Go Yeona.
"Coming all the way to the main house without a word, and not even a greeting for your little sister? That's just cruel~?"
Yeona gave a sly, eye-crinkling smile, sidled up beside Yushin, and plopped down onto the sofa next to him. As if the very concept of distance had evaporated, her ample C-cup breasts strained the hoodie's fabric taut and pressed flush against his forearm.
"You... why aren't you at training? What are you doing here?"
"Dad called me in a hurry this morning, so here I am! Wait—did you come for the same reason? Don't tell me, Oppa... you awakened?!"
Yeona's violet eyes flashed with feverish anticipation.
"Yeah. I did."
"Really?! Whoa, that's huge! What type? What attribute? Combat or support?"
"Dimension."
One word. In that instant, Yeona's breath caught in her throat. Her eyes shook violently, as if an earthquake had torn through them.
"...Dimension? The dimension type?"
Her lips quivered—and the next moment she flung both arms around Yushin's neck, pressing her entire body against him. Glomp!
"Hey—what's gotten into you all of a sudden?!"
"I'm never letting go! What if you go hopping off to some other world with your dimension travel, huh?!"
The strength coiled in Yeona's arms was no laughing matter. An embrace laced with the hardened mana of an A-rank hunter, and the pressure of hot, soft flesh bearing down on his chest through the hoodie—Yushin's breath hitched in his throat.
"Besides, blood or not, we're the officially betrothed couple this clan has arranged for generations. This much skinship is just my natural right."
Yeona curled her lips into a seductive smile and, none too subtly, slid her porcelain-smooth thigh between his legs and began to rub. It was the Go Clan's privilege—betrothal even between blood siblings was quietly tolerated for the sake of preserving the family's pure bloodline. And Yeona was using that privilege as her excuse to devour Yushin whole, as a man.
Watching, his mother finally pressed a hand to her forehead.
"Yeona, that's quite enough. Your father is right here."
"Tch..."
Yeona pouted and reluctantly pulled back, but her gaze stayed glued to Yushin all the same—sticky, burning, like a bitch in heat.
Just then, the study door opened, and the clan head, Go Hyeonseok, walked out with a dignified stride.
"That's enough, all of you."
At that single utterance, the air in the living room went cold. His father settled onto the sofa across from Yushin and bored his weighty gaze straight through his son.
"If you have awakened as a Dimensional Wanderer, then your registration with the Hunter Association must first be reviewed with the utmost care. It is an ability that even at the national level can only be handled as top-secret."
"I... know nothing at all about this ability."
When Yushin laid it out honestly, his father drew a deep breath.
"I imagined as much. The dimension type is the most dangerous ability of all—its results erupt before one can even begin to grasp its principles and limits. A single mistake, and you become a lost child of another dimension for all eternity, dying alone. So... you have already tested the ability, haven't you?"
"...Yes. I went and came back once."
His father nodded and murmured, low and measured.
"I knew it. The mana steeped through your entire body has been honed deep and fierce beyond all comparison with a few days ago. That is no mere awakening's pulse—it is the bearing of one who has already walked the four corners beyond a dimension and returned alive."
His father rose from his seat and laid a hand on Yushin's shoulder.
"Both the danger and the greatness of this power have already been proven in blood within our clan's history. Yushin—in the long history of our Go Clan, only two ancestors ever bore the authority of the Dimensional Wanderer and reached true greatness."
He recited the names in a solemn voice.
"Dongmyeong the Holy King, founding sovereign of Goguryeo. And Gwanggaeto the Great, the conquering lord who held the continent in awe."
In that instant, the living room sank into a silence so absolute that not even breathing could be heard. Yeona's eyes went wide, and his mother clutched at her chest.
Yushin swallowed drily and asked.
"Then... what became of the other awakeners, the ones besides those two?"
"Every last one of them perished."
The answer was resolute and cold.
"The dimensions tempt a man without end. Toward mightier mana, toward crueler dominion, toward the lewd and beautiful females of other worlds, and toward an easier road to absolute power. The ancestors who failed to reach greatness all had their souls gnawed hollow by those sweet temptations—driven mad and dying, or twisted into monsters of the dimension and erased from existence."
Yet before that dreadful history of tragedy, Yushin's heart did not tremble with fear. It surged with a thrill he could not contain.
'That so many failed doesn't mean this power is impossible. It means it is an absolute royal road that only the rarest few—true conquerors—can ever bear.'
Yushin lifted his head and met his father's deep eyes head-on.
"How did those two ancestors overcome the temptation and survive?"
"Because to the very end, they never forgot who they were, nor where the reality they had to return to lay."
"Then... I will become that third legend."
Yushin's voice, brimming with conviction, rang through the main house's living room.
"I have already set foot on the far side of a dimension, and I returned after bending a vampire and a succubus to my will. I have no intention of running, nor of being swallowed by that place. I will not fall, and I will not go mad—I will become the third conqueror who subjugates the demon realm completely and comes home."
His father stared long and hard into Yushin's eyes, and at last a deep smile settled on his lips.
"Good. Then you have proven yourself worthy to become not a second, but the true third."
Yeona seized the opening without a moment's delay, grabbing Yushin's hand in a tight grip.
"Every time you start wavering over the females of some other world, I'll wring you out with my whole body in bed and drag you right back to reality. Got it?"
At his sister's thick, lewd, obsession-drenched declaration, Yushin could only manage a hollow laugh.
His father disappeared into the study and returned with a single old tome steeped deep in the wear of ages, setting it down before Yushin.
"This is the secret record of the Dimensional Wanderer left behind by our ancestors. Now, it is yours."
With trembling hands, Yushin received the ancient record. The great epic of his bloodline's destiny and of dominion over the dimensions was, at last, about to unfold in earnest—weaving between reality and the otherworld alike.