The air in the dormitory-style room of the Grisel Guild Hall was stale with the lingering scent of old wood, damp wool, and the faint, ever-present hint of monster blood that never quite washed out of adventurer's gear. Tadao lay on his back on the bottom bunk of a creaky wooden frame, his arms folded behind his head, staring at the slats of his sister Fumiko's bunk above him. The sounds of the guild settling for the night filtered through the thin walls—muffled laughter, the clank of tankards from the hall below, the heavy tread of boots on floorboards.
This is it, he thought, the bitterness a familiar, acidic taste on his tongue. My epic isekai adventure. Sharing a bunk bed with my mom and sisters.
A month. One entire month since the blinding light from his RuneSky Online monitor had swallowed his living room and spat them out here, into the cobblestone and fantasy of Grimwalt. The initial shock had been a chaotic blur of panic and wonder, quickly overridden by the stark, glowing blue status screens that had materialized before each of them. Classes. Stats. And for his mother and sisters, those glittering, special ability notifications.
For him? A single, underwhelming line: Thief's Dash (Lv. 1).
A movement skill. Useful for running away. A cruel joke from whatever cosmic entity had dragged them here. The "goddess," as they'd taken to calling the disembodied, ethereal voice that had given them the ultimatum—defeat the Demon King and his subordinates to return home—had clearly played favorites.
The door to their small room clicked open, and Etsuo stepped inside, her movements quieter than her imposing presence usually allowed. She'd changed out of her white gown and silver armor into simple, grey sleeping robes, her black hair freed from its low bun and cascading in soft waves over her shoulders. She looked tired, but her sharp eyes immediately scanned the room, landing on Tadao.
"You're still awake," she said, her voice a gentle murmur. It wasn't a question.
"Thinking," Tadao grunted, not moving.
"About today?" She walked over, her robe whispering against the floorboards. She placed a hand on the bunk's post, her gaze softening. "The sparring match…"
"The bet," Tadao corrected, finally sitting up. The memory was a fresh bruise. The humiliation of Derrick's boot on his chest, the smug look on Fynn's face, the way his sisters had been led away because of his failure. "I lost. They won. Because of me, Rin and Fumiko had to go out with those… those NPCs." He spat the game-term like a curse.
Etsuo's lips thinned. "They are people here, Tadao. Just like us now. And your sisters are grown women. They made a choice to honor the pact you agreed to." Her tone held no real reproach, only a weary reminder. "But yes. Your recklessness has consequences that extend beyond yourself. You must learn that."
"I was trying to prove I wasn't useless!" The words burst out of him, louder than he intended. From the top bunk, he heard Fumiko stir slightly.
"You are not useless," Etsuo said, her voice dropping to a firm, hushed intensity. She knelt beside the bunk, bringing her face level with his. In the dim light of the single oil lamp, she looked younger, the lines of worry around her eyes more pronounced. "You are my son. You are brave, and stubborn, and you have a good heart. But strength in this world… it isn't just about swinging a sword you can barely lift."
"Then what is it?!" Tadao whispered back, frustration making his throat tight. "Mama, you can fly and shoot spears of light. Rin can cleave a monster in two without breaking a sweat. Fumiko can conjure fire and ice like it's nothing. What do I do? Dash behind them and pick up the loot?"
Etsuo reached out and cupped his cheek. Her hand was calloused from sword grips, but her touch was warm. "Your father," she began, and Tadao felt a familiar, complicated twist in his gut at the mention of the man who hadn't been pulled into this world with them. "When I first met him, he wasn't the strongest, or the richest. He was determined. He watched, he learned, he practiced until his hands bled. He found what he was good at—truly good at—and he mastered it. He didn't try to be a warrior when he was a thinker, or a mage when he had no talent for it. He became the best version of himself." She smiled, a sad, fond thing. "You have his spirit, Tadao. This… Thief's Dash. Have you truly explored it? Or have you just cursed it for not being a fireball?"
Tadao looked away, her words needling a place he'd been deliberately ignoring. He'd used the dash to close distance in fights, poorly. He'd used it to dodge, clumsily. He'd never considered it as anything but a consolation prize.
The door opened again, and Rin and Fumiko slipped in. The atmosphere in the room shifted palpably. They moved quietly, avoiding eye contact with their mother and brother. Rin's usual confident swagger was subdued, replaced by a deliberate, almost cautious grace. Fumiko kept her glasses-cleaning cloth clutched tightly in one hand, her gaze fixed on the floor.
They smelled faintly of the tavern—ale, roasted meat, woodsmoke—but underneath it was something else, a nervous energy that clung to them like static.
"You're back late," Etsuo said, standing up. Her voice was neutral, but her eyes were watchful.
"The… dinner ran long," Fumiko said, her voice barely audible. She finally glanced at Tadao, and a flush crept up her neck. "We're sorry for worrying you."
Rin just nodded, pulling her high ponytail loose and running a hand through her short black hair. "Yeah. It's done. Pact fulfilled." She wouldn't look at anyone.
Tadao studied them. Their clothes were slightly rumpled. Fumiko's turtleneck dress was perfectly in place, but a strand of her long, usually pristine hair had escaped its silken fall. Rin's brown pants and collared top looked the same, but there was a tension in her shoulders that hadn't been there during their spar. And their faces… they weren't upset or angry. They looked… flustered. Guilty, but also strangely preoccupied.
"Did they… were they decent to you?" Tadao asked, the question awkward in his mouth. He felt responsible, but also a strange, protective heat he didn't fully understand.
Rin barked a short, humorless laugh. "Decent? Derrick's a brute and Fynn's a smug pretty-boy. But they paid for the meal." She finally met Etsuo's gaze, and something unspoken passed between them—a question, a confirmation. Rin's eyes flickered away first.
"We're tired," Fumiko announced, too quickly. "We should sleep. Big day tomorrow, right? We have that escort quest for the merchant caravan to Oakhaven."
"Yes," Etsuo said slowly, her gaze lingering on both her daughters. "A good night's rest is important." She turned back to Tadao. "Think on what I said. Goodnight, son."
She moved to her own simple cot in the corner of the room, leaving Tadao with his churning thoughts and the rustling sounds of his sisters preparing for bed above him.
He lay back down, listening. The creak of the bunk as Fumiko settled. The soft sigh from Rin. No whispered conversation. Just heavy, loaded silence.
Skill XXX.
His mother had whispered those words to them in the motel room, after the… incident. He'd only gotten a glimpse, a chaotic snapshot of tangled limbs and shocked faces before Etsuo had shoved him out, but those two words had hung in the air afterwards, charged with meaning he couldn't grasp. His sisters had it too. That "special ability" on their status screens they'd never used, never understood.
And now they were acting weird. Now his mother had that knowing, worried look in her eyes.
What does it do? The question was a worm in his mind. Was it some kind of combat buff? A hidden power? Why did the mention of it make his mother blush and his sisters avoid each other's eyes?
He tossed onto his side, the straw-filled mattress crunching under him. Beyond his personal frustration, a colder, more rational fear was beginning to crystallize. This world wasn't a game. The rules were different. The stakes were real. His family was powerful, but they were also vulnerable in ways he didn't comprehend. And he, the weakest link, was in no position to protect them from threats he couldn't even see.
*
Morning in Grisel dawned grey and damp, a fine mist clinging to the cobblestones and dripping from the guild hall's sign. The merchant, a rotund man named Borin with a perpetually worried expression, was already fussing over his two laden wagons when Etsuo's family approached. The quest was straightforward: escort him and his goods—a shipment of Grisel-forged tools and rare spices—along the forest road to the larger town of Oakhaven, two days' travel east. Bandits were rumored to be active, and the woods held lesser monsters, but it was a standard guild assignment. The kind they'd done a dozen times before.
Yet, the dynamic was off.
Rin and Fumiko worked with their usual efficiency, checking gear and loading packs, but they moved around each other like opposing magnets, careful not to touch or speak directly. Rin's greetings were curt, her smiles forced. Fumiko was buried in a logistics scroll, her glasses fogging in the humid air.
Etsuo was the anchor, discussing the route with Borin in her calm, authoritative voice, her silver armor polished to a dull gleam under the overcast sky. But Tadao saw the way her eyes kept tracking her daughters, the slight frown that would appear and then be consciously smoothed away.
Tadao himself felt like a ghost. He'd sharpened his new short sword until the edge could split a hair, had practiced his dash in the empty guild courtyard until his legs ached—a short, sudden burst of speed that covered about ten feet in a blur, leaving him slightly dizzy. It was something. But watching his mother and sisters, he felt the gap between them wasn't just one of power, but of shared, silent understanding from which he was excluded.
"Everything is in order, Lady Etsuo," Borin said, wringing his hands. "The sooner we depart, the better. I don't like the smell of this fog."
"We'll keep you safe, Mr. Borin," Etsuo assured him. She turned to her family. "Rin, you'll take point with me. Fumiko, you and Tadao flank the wagons. Keep your eyes on the tree line. Standard formation."
They nodded, falling into place without a word. The wagons creaked into motion, pulled by sturdy draft horses. The party moved out of Grisel's open gates and onto the packed earth of the forest road, the mist swallowing the sound of their footsteps almost immediately.
The first few hours were tense but uneventful. The ancient oaks and pines formed a shadowy corridor on either side, their trunks thick with moss. Birds called, unseen. The only sounds were the rumble of wheels, the clop of hooves, and Borin's nervous humming.
Tadao walked beside the rear wagon, his hand on his sword hilt. Fumiko was on the opposite side, her staff held loosely but ready. He glanced at her. She was staring straight ahead, her jaw set.
"Fumiko," he said, keeping his voice low.
She flinched, almost imperceptibly. "Yes, Tadao?"
"Are you… okay? After last night?"
She adjusted her glasses, a nervous tic. "I'm fine. It was just a dinner. It's over."
"It didn't seem like it was 'just a dinner' when you came back," he pressed, a spike of frustration making him bold.
"You shouldn't have made the bet," she said, her tone sharper than she usually used with him. It wasn't anger, but a kind of strained deflection. "Then we wouldn't have had to go. What were you thinking, challenging both of them?"
"I was thinking I could win!" he shot back, his volume rising slightly. Borin looked back nervously from the driver's seat of the front wagon.
"You can't win fights like that, Tadao!" Fumiko hissed, turning her head to glare at him. Her calm, scholarly demeanor was cracked, revealing genuine exasperation. "Not yet! You have to be smarter! You can't just… just dash headfirst into every problem and expect us to clean it up!"
Her words stung, mostly because they were true. But they also felt like a diversion. "This isn't about the fight," he said, lowering his voice again. "This is about what happened after. You and Rin… and that thing Mama mentioned. Skill XXX. What is it?"
Fumiko's face went pale. She looked away, back to the trees. "It's nothing. A… a status effect. It's complicated. You wouldn't understand."
"Try me!"
"It's private, Tadao!" The outburst was quiet but fierce. She blinked rapidly, and for a horrifying second, Tadao thought she might cry. "Just… please. Drop it. For now. Focus on the road."
She quickened her pace, putting more distance between them along the flank of the wagon. Tadao was left feeling like he'd kicked a wounded animal. The confusion and isolation deepened.
Up ahead, Rin and Etsuo walked in silence for a long stretch. The mist had begun to burn off, shafts of watery sunlight piercing the canopy. The road began a gentle ascent.
"He's asking questions," Rin said finally, her voice a low rumble meant only for her mother's ears. She didn't look at her, her eyes scanning the shadows between the trees.
"I know," Etsuo replied, equally quiet. "He's not a fool."
"He's going to find out eventually. Especially if it… happens again."
Etsuo's grip tightened on her sword's hilt. "We need to understand it ourselves first. We gained… abilities from those encounters. Useful ones. But the cost, the method…" She shook her head. "It feels like a transaction. A dangerous one. We cannot let it control us."
Rin snorted softly. "It doesn't feel like we're in control, Mama. It feels like a switch gets flipped. One minute you're you, the next…" She trailed off, her cheeks coloring slightly. "Fumiko and I… we agreed not to talk about it. To each other, or to anyone."
"That is probably wise, for now," Etsuo said, though she sounded unhappy with the solution. "But secrecy within the family is a poison. We must find answers. The goddess—"
"—isn't exactly holding office hours," Rin finished dryly.
"There may be another way," Etsuo mused. "Lore. History. This world has its own rules, its own magic systems. If this 'Skill XXX' is a known phenomenon here, perhaps there are records. In a library, or an archive. Oakhaven is larger. There may be resources."
"You want to research why we suddenly turn into…" Rin cut herself off, glancing back at the wagons. "…why we get those urges."
"I want to understand the weapon we've been given," Etsuo corrected, her tone steel. "Before it uses us."
Their conversation was cut short as Rin suddenly held up a clenched fist—the halt signal. Everyone stopped. Etsuo was instantly alert, her golden wings of light flickering into a semi-corporeal outline at her back, ready to fully manifest.
"What is it?" Borin squeaked from his wagon.
Rin didn't answer, her head tilted, listening. Her axe was in her hands now. "Something up ahead. Around the bend. Not natural."
Tadao strained his ears. Over the forest sounds, he heard it—a low, guttural chittering, and the sound of something heavy being dragged.
Etsuo nodded. "Ambush point. Rin, with me. We'll clear it. Fumiko, shield the wagons. Tadao, stay with your sister and protect Borin."
The command was automatic, tactical. Tadao's role, again, was to stay back. Guard. He opened his mouth to protest, but Fumiko was already moving, her staff glowing as she began weaving a shimmering dome of protective energy around the two wagons and their cowering driver.
"Do as Mama says," Fumiko said, her voice tight with concentration. Her earlier vulnerability was gone, replaced by focused power.
Etsuo and Rin advanced, moving with lethal grace off the road and into the trees, disappearing into the dappled shadows. Moments later, the sounds of battle erupted—the sickening thud of Rin's axe connecting, a shrill, inhuman shriek, the bright flash of Etsuo's light magic briefly illuminating the gloom. It was over in less than a minute.
They emerged back onto the road, Rin wiping dark, oily blood from her axe blade onto the moss. "Goblin scavengers," she reported. "Three of them. Setting a pit trap. Pathetic."
Etsuo's wings faded. "They're getting bolder, so close to the road." She looked back at the wagons, at Fumiko maintaining the shield, at Tadao standing with his sword drawn but unused. Her expression was unreadable.
The rest of the day's travel passed without further incident. They made camp as dusk fell in a small, defensible clearing just off the road. Routine took over: Rin gathered firewood, Etsuo and Fumiko prepared a simple stew from rations, Tadao helped Borin unhitch and tend to the horses. The normalcy of the tasks was a relief, a temporary suspension of the unspoken tensions.
As they sat around the crackling fire eating, Borin, emboldened by safety and hot food, grew chatty. "You are quite the family," he said, slurping his stew. "The talk of Grisel, you know! The formidable Lady Etsuo and her dazzling daughters! A blessing to the guild!" He chuckled, then his gaze fell on Tadao. "And the young lad, learning the ropes! A fine squire in the making, I'm sure."
Tadao stiffened, his spoon halting halfway to his mouth. Squire.
Rin's lips twitched. Fumiko looked down at her bowl. Etsuo's smile was polite but didn't reach her eyes. "My son has his own path to walk, Mr. Borin."
"Of course, of course!" Borin said, oblivious. "Say, I couldn't help but overhear a little tiff earlier. About some… skill?" He leaned in, his voice becoming conspiratorial. "Not to pry into adventurer business, but in my line of work, I hear things. Traveler's tales. The word 'skill' paired with roman numerals… it rings an old bell."
The fire seemed to crackle louder. All movement around the campfire stopped. Etsuo put her bowl down slowly. "What have you heard, merchant?"
Borin, sensing he had their full, intense attention, puffed up slightly. "Well, it's old legend, mostly. Folk stories from the founding of the kingdoms. They say the First Heroes, the ones who drove back the Shadow centuries ago, were blessed—or cursed—by the gods with 'Legacy Skills.' Unique powers, marked on their souls with strange symbols. Some were glorious, like commanding storms or healing any wound. But others…" He lowered his voice dramatically. "Others were more… transactional. Powers that required a… a catalyst to awaken. A sacrifice of a sort. The stories are vague. Some say it was an item of great value. Others whisper it was a… a personal concession. A piece of one's own morality, traded for might." He shrugged. "Probably just myths to explain why some heroes went mad or disappeared. But the 'Skill X' designation… that's in the old texts. 'X' for the unknown variable, the price unpaid."
The silence that followed was thick enough to choke on. The only sound was the fire and the distant hoot of an owl. Tadao looked from his mother's frozen expression to Rin's wide eyes, to Fumiko's hands, which had begun to tremble slightly.
A personal concession. A piece of one's own morality.
The motel room. The blacksmith's back room. The flushed faces, the secretive glances. It wasn't a combat buff. It was a deal. A terrible, humiliating deal they'd been forced into without fully understanding the terms.
"These… texts," Etsuo said, her voice carefully controlled. "Where would one find them?"
"Oh, the great library in the capital, Lysternea, would have copies, surely," Borin said, waving a hand. "But for a more… accessible source? The Abbey of the Silent Scribes, a day's north of Oakhaven. Reclusive lot, but they're historians and lore-keepers. If anyone has records of the First Heroes' legacies, it would be them. Though getting them to share…" He shrugged again. "They don't like outsiders."
Etsuo nodded, her mind already racing ahead. "Thank you, Mr. Borin. That is… most informative."
The merchant, pleased with his contribution, returned to his stew. The family did not. The campfire camaraderie was dead, replaced by a cold, shared dread. The mystery had a name now, and a historical precedent. It was real, it was dangerous, and it was inside them.
Later, during Tadao's watch shift, he sat with his back against a wagon wheel, staring into the darkness beyond the firelight. The revelation churned inside him. His mother and sisters had… traded something. For power. To protect him? To survive? The guilt was a physical weight, pressing down on his chest.
A soft footfall made him turn. It was Rin, wrapped in a blanket over her sleeping clothes.
"Can't sleep?" he asked.
"No." She sat down beside him, not too close. For a long time, she just stared at the dying embers. "You heard Borin."
"Yeah."
"It makes a sick kind of sense," she said, her voice rough. "The goddess didn't just give us powers. She gave us a… a hunger. And it gets fed in a specific way. And then we get stronger." She wrapped the blanket tighter. "I gained an affinity for heavy armor and broadswords. Fumiko got wind magic on top of her fire and ice. Mama can appraise minerals and craft like a master now."
"And what did it cost?" Tadao whispered, the question hanging in the cold night air.
Rin didn't answer for a full minute. "I don't know," she finally said, and it sounded like the truth. "A piece of our morality, like the story says? Our dignity? Our… control?" She shook her head. "All I know is, when that voice said 'Skill XXX activated,' I stopped being me for a while. And I… I didn't hate it. That's the worst part, Tadao. I wanted it. And that scares me more than any demon king."
She looked at him then, her usual bravado completely stripped away. In the faint light, she just looked like his older sister, tired and afraid. "You can't tell Mama I said that. We're not talking about it. We're trying to pretend it didn't happen."
"But it did happen," Tadao said, a spark of his old anger igniting, but now it was directed at the situation, at the goddess, at this whole twisted world. "And it's going to happen again, isn't it? If you need to get stronger, or if the 'skill' just… triggers?"
Rin's silence was confirmation enough.
"Then we have to fix it," Tadao said, the words surprising him with their conviction. "We find that abbey. We get answers. And we find a way to break this… this curse."
Rin studied him, a faint, sad smile touching her lips. "When did you get so grown up?"
"When I realized being the 'weak one' means I'm the only one who might still be thinking clearly," he said, not with bitterness, but with a new, grim determination. "I can't fight a black dragon. But maybe I can do this. Maybe Thief's Dashisn't for fighting. Maybe it's for getting into places you're not supposed to be. Like a library vault. Or an abbey's scriptorium."
For the first time in days, Rin's smile reached her eyes, a glimmer of her old self. "Now you're thinking like a thief, not a warrior." She punched his shoulder lightly. "Just… be careful, okay? We're messed up, but we're still your sisters. We don't need you getting hurt trying to save us."
"Too late," Tadao said, looking back into the fire. "You already are."
They sat in silence after that, a fragile, new understanding bridging the gap between them. The road to Oakhaven, and the secrets of the Silent Scribes beyond it, awaited. The real adventure, Tadao realized, wasn't about slaying monsters for gold. It was about saving his family from the power that was supposed to be their salvation.