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Asuna tames a dungeon boss. Unwillingly...

Summary:

Solo-diving SAO's icy dungeon, fierce Asuna faces a horned hellhound boss

Which she then tames despite having no tame skills...

Notes:

Work Text:

Asuna's boots crunched against the frost-kissed stone of the dungeon's third layer, the air thick with the metallic tang of ancient ice and lurking decay. She had slipped away from the front lines and training that morning, her rapier gleaming under the dim torchlight flickering from sconces embedded in the walls. Kirito was off somewhere, probably grinding solo as usual.

Typical of him. She didn't mind the solitude today though; it sharpened her focus, let her chase the rhythm of battle without distractions. In Aincrad, control was everything, and this mid-level dungeon, the Frostfang Labyrinth, promised rare crystals and gear upgrades. But what she was after most was an uncommon food drop that would help upgrade her cooking skill. Even if it wasn't real she wanted something that tastes good, plus the slight buffs never hurt. But she most enjoyed seeing the look on Kirito's face whenever she brought him something to eat.

Her hand hovered over the map as she descended the spiral stairs, HUD displaying her stats: Level 42, HP full, MP at 85%. The first floor had been child's play. Packs of ice wolves shredded by her Linear attacks, their pelts and meat auto-looted into her inventory. But whispers from NPCs in Floor 47's town square spoke of hidden paths here, treasures guarded by tricks that could be bypassed. Asuna thrived on that edge though and she was overleveled for this dungeon, the thrill of outmaneuvering the system's cruelty.

Deeper in, the corridors narrowed, veins of blue crystal pulsing like frozen arteries. A goblin patrol ambushed from a side alcove. Three of them, rusted axes raised. She sidestepped the first swing, rapier flashing in a Starburst Stream barrage. Blades danced, severing limbs in sprays of pixelated blood before vanishing. The last goblin lunged; she parried, twisted, and drove her heel into its throat before finishing with a precise thrust. Loot icons pinged: minor potions, a chunk of mythril ore. Satisfying, but routine.

The hour blurred as she pressed on. Puzzle doors yielded to her pattern recognition. Dumb light puzzles that just had to mimic constellation alignments. She collected frost shards along the way, their chill seeping through her gloves, a reminder of the game's merciless physics. Sweat beaded under her chestnut hair despite the cold; her breaths came steady, controlled. ‘This is what I need,’ she thought. ‘No guild politics, no waiting for tanks to catch up. Just me and easy progression.’

The fourth sub-level opened into a vast chamber, stalactites like jagged teeth overhead. In the center, an ornate chest squatted on a pedestal, gold filigree etched with runes that glowed invitingly. Asuna's eyes narrowed. No mobs in sight, no traps visible on her detection skill. Her heart quickened. Jackpot?! She approached cautiously, rapier drawn, scanning for pressure plates. The lid creaked open at her touch, revealing a shimmering dagger, and a scroll? She reached in, fingers brushing parchment.

The floor vanished? And she plummeted… As the room light dimmed then cast a red glow. Her stomach lurched as it dropped into darkness, grinding to a halt with a thunderous clang. Torches ignited around a colossal arena, walls etched with demonic snarls. The chest had been a teleporter, a classic SAO deceit. And now, a boss room. Great…

A guttural roar shattered the silence. From the shadows opposite erupted the boss. A quadrupedal nightmare, its body a rippling mass of obsidian fur matted with frost. Crimson eyes burned like embers, curved horns spiraling from its lupine skull, jagged and black as sin. Claws like scythes gouged the stone as it prowled, tail lashing, fangs bared in a maw dripping viscous saliva. Hellfire Hound, her HUD labeled it, Level 45 Elite Boss with 2 health bars. No wonder the chest lured fools here. Fools like her…

Adrenaline surged. Asuna burst forward, rapier igniting in a blaze of sword skills wanting to end this quick. The hound charged, faster than it looked, jaws snapping. She vaulted left, blade slicing its flank. Critical hit, it HP bar dipping slightly. It wheeled, horns hitting the air where she'd stood moments before. Dodge, counter: her rapier wove a deadly tapestry, Vertical Arc carving gashes along its ribs. The beast howled, flames erupting from its maw in a cone of hellfire. She rolled, heat singeing her cloak, MP draining as she kept up the attack. At this rate she would have to bring out her potions…

The fight settled into a deadly ballet. Asuna danced on the periphery, exploiting gaps. Thrust to the underbelly, slash at hamstrings. The hound's attacks grew savage and quicker: claw swipes cratering stone, horn charges that cracked her guard once, shaving 20% HP. Potions kept her steady, her breaths ragged but precise. ‘It's all in the patterns’ she noted. ‘Feint left, true strike right.’ She baited it, landing a 12-hit combo that plummeted its health to 15%. Victory teased, so close.

Then it adapted, and changed. The hound reared, forepaws slamming down in a quake that unbalanced her. She recovered mid-stumble, but its tail whipped like a barbed lash, smacking her rapier from numb fingers. The blade skittered across the arena, out of reach. “N-no!” Panic flickered, but she drew her dagger. Too slow. The beast pounced, mass pinning her to the cold ice. Hot breath washed over her face, red eyes locking with hers, intelligent malice gleaming.

She thrashed, dagger stabbing futilely into fur as thick as armor. Claws raked her armor, shredding pauldrons in sparks of durability loss. Pinned, legs splayed by its weight, she felt its underbelly grind against her, a throbbing heat pressing insistent through her skirt. “W-what?” The game's mechanics felt twisted; no deathblow came. Instead, the hound's hips bucked, tearing at her lower garb with fangs. Cloth ripped, exposing thighs to the chill air, then more. Her underlayers shredded like paper. Asuna gasped in realization.

Horror bloomed as the beast's member emerged, barbed and swollen, veins pulsing with infernal heat. It prodded her dry pussy, slick with its own pre, but rough, unyielding. Asuna screamed, shoving at its chest, nails digging into fur trying to use her decent strength skill to push him off. "Get off me!" But the system held her immobilized, a debuff icon flashing: ‘Dominant Grasp’.

Then before she could react or be ready the tip breached, stretching her walls in a burn that tore a gasp from her throat. Pain lanced deep, sharp as shattered glass. Her hymen giving way, a trickle of pixelated blood warm against her skin, slickening the invasion, crimson mixing with the monsters pre-cum as it dripped. How the game knew she was a virgin was anyone's guess, she was only 16 for crying out loud!

She bucked wildly in response, futilely, heels scraping stone, fists pounding ribs that didn't yield. Each thrust drove deeper, the barbs scraping inner flesh, drawing more crimson to ease the friction. “F-fuck!” Tears stung her eyes; this wasn't combat, this was a violation, the game's sadistic new mechanic. Thrust after thrust she sobbed, not able to do much else. But her struggles faltered as its rhythm built, the blood and pre-cum turning the hurting barbs into slick points of pleasure. A traitorous spark ignited low in her belly, pressure coiling amid the ache.

The hound growled low, hips pistoning with fury, balls slapping her ass in wet smacks. Asuna's cries shifted from sobbing to panting, Pain laced with unwelcome dopamine twitches, nerves firing in confusion. Her body betrayed her, hips rolling involuntarily as barbs tugged against her sensitive inner walls. ‘It hurts... but why does it also feel…’ Her mind couldn't finish that thought as heat bloomed, chasing the sting, pleasure finally cresting like a wave crashing over jagged rocks. She whimpered, fingers curling into its dark fur not to push away, but to steady herself, she wanted more. ‘Remember It's not real. None of it is.’ That realization unlocked surrender thrill surging as the last of the slight pain transmuted to ecstasy.

Her walls clenched around the invading length, milking it as thrusts hammered her cervix. The beast's knot swelled at the base, stretching her further, locking them in primal union. She arched, a moan escaping unbidden, nails digging into its hide in desperate need. Climax ripped through her body first, vision whiting, body convulsing in shameful release. The hound followed, roaring, vibrating through her as torrents flooded deep. Hot, thick seed painting her womb, pressure bloating her belly slightly. Excess oozed past the seal, mingling with blood in sticky rivulets down her thighs, pooling beneath as Asuna's eyes rolled back in ecstasy.

It stilled above her, knot pulsing with aftershocks, red eyes dimming from rage to docility? The dominant grasp debuff lifted; Asuna slumped, panting, cum leaking in lazy drips as the knot deflated. The beast withdrew with a wet schlick, more cream spilling free, her folds gaping, ruined and sated. Shame warred with afterglow, but a system prompt chimed:

[Tame Hellfire Hound? Yes/No]
[Note:If successful +2 to all tame skills, target is a Boss. Success is not guaranteed.]

She had no such skill. Zero investment in tamer builds. Yet the creature nuzzled her thigh, tongue lapping gently at the mess, almost affectionate. ‘Why not go for it, if its a bug might as well capitalize…’ Curiosity overrode logic; she tapped Yes. Light engulfed it, HP bar linking to hers as a pet icon appeared below hers in her menu: Hellfire Hound - Alpha (Ability Mountable). A new skill unlocked: Demonic Ride - Summon spectral saddle for high-speed traversal.

Asuna staggered up, legs trembling, pixelated cum still trickling down her calves. She retrieved her rapier, durability low but intact thankfully. The arena doors unsealed, loot chest materializing: epic crystals, boss pelt, armor set, even the food loot she came here, forgotten. But the hound. Now her tame. Padded loyally beside, tail wagging, “This… is new. Um, sit!” She commanded and he blinked before sitting on his haunches.

Exhausted, she finally looked over the loot from the chest, looking down at her own ruined armor, white tatters and ribbons barely hanging on, exposing her curves and breasts and the cum and blood despawned as she selected the armor. This new armor was black, red and looked super bulky… not her style but it covered up her body. It looked like what a samurai would wear without the headgear. She sighed in annoyance, it looked terrible on her.

Going back over to the canine companion. Clicking over the ability she summoned the saddle experimentally. A ghostly harness of crimson energy forming on its back. But mounting felt natural save for her new armor, the wind and cold going through her, thighs gripping furred flanks still tacky with their fluids. A mental command, and it bounded forward, speed blurring the corridors. Wind whipped her hair as they tore through remnants of the dungeon, ice wolves scattering in terror as she ran past on her mount. Her HUD pinged level-ups; the bond granted EXP share.

Back on Floor 47, hud chatter exploded as she teleported and waited in the square for them while on her tame. "Asuna! What the hell is that… and what are you wearing! That looks totally badass!" Klein gawked, sword half-drawn in shock.

"Its uh a long story," she said coolly, stroking its horn while still on its back. It leaned into her touch, rumbling contentedly.

Kirito appeared from the crowd beside Klein, eyes widening. "So you… Solo cleared an earlier dungeon? And... tamed a boss as a mount? And new armor?"

She met his gaze, a secret flush warming her cheeks. Thank god they didn't know how she tamed it. "S-something like that. So uh, want to see what it can do?"