A/N: Another DxD lewd. This time featuring SI Kiba x Rias.
"You know, I prepared so much for this day that I'm kind of disappointed it ended so quickly," Kiba mused, perched casually atop Riser's prone body.
Riser Phenex lay sprawled beneath him, his once-pristine suit now shredded and bloodied, his body impaled by multiple swords of varying sizes. The largest blade, its ominous glow pulsating like a heart, continuously absorbed the flames Riser desperately conjured, preventing him from healing.
"Urgh..." was all Riser could manage.
At this point, he'd stopped struggling. Two of the smaller swords embedded in his limbs drained his strength with every passing second, while a dagger-sized blade near his ribs emitted a faint shimmer—the paralysis effect locking him in place.
"I mean, I even brought enough swords to do this ten times over," Kiba continued, his voice laced with clear disappointment. "But you went down on the first try. Really?"
He sighed, shaking his head.
'Good thing I convinced Rias to challenge him a year early. If we'd waited until 'canon,' I'd be even more disappointed than I am now.'
Off to the side, Koneko was single-handedly dismantling what remained of Riser's peerage. Only two members were missing from the battlefield—Riser's Queen, Yubelluna, and little sister, Ravel, who was being taken care of by Akeno and Rias respectively.
Kiba winced as he watched Koneko drive her heel into the back of a certain Chinese martial artist-themed Rook, bending the poor girl's body in a way that definitely wasn't natural.
[Riser Phenex's first Rook, retired.]
A flash of light engulfed her and she was gone in the next instant.
"Ouch. Kind of feel bad for them."
Koneko, unfazed, blocked a downward sword strike before sucker-punching the wielder in the face—hard. The girl staggered, her weapon slipping from her grasp as she barely remained standing.
Koneko was already a powerhouse, more than capable of handling two or three, maybe even four, of Riser's peerage at once. And that was before Kiba had given her that pendant. A pendant made up of tiny "swords" connected by their pommels, each granted a different physical enhancement,. Together, they amplified all of her physical abilities to absurd levels.
But the real prize among them wasn't the boosters—it was the small, white sword at the center of the pendant. A blade he had spent an entire day pouring Demonic Power into just to create it.
The Sword of Sacrifice.
It did exactly as the name implied: in the event of a fatal strike, the sword would shatter, taking the hit in place of the wielder—so long as the attack wasn't beyond a low-Ultimate-Class in strength at least.
'A damn shame the original Kiba wasted so much of his potential.'
The guy had focused too much on the quantity of swords and his skills, not enough on quality. He had crafted maybe five unique blades with special effects before defaulting to summoning generic swords en masse. And that was a waste. He had both Demonic Power and Sword Birth, two powers that relied on imagination as their foundation. He should have been able to do so much more.
Of course, both abilities had their drawbacks.
Demonic Power allowed for near-limitless magical effects, but the more complex the effect, the more power it cost. Past a certain point, even the Satans struggled with feasibility—except maybe Ajuka Beelzebub, whose Kankara Formula practically ignored that restriction. That was why Clan Traits were such a big deal; they let a Devil perform feats they normally shouldn't be capable of.
Sword Birth, on the other hand, was ridiculously efficient in its power usage, allowing for the spontaneous creation of countless swords with minimal energy. The downside? Without a solid understanding of the desired effect, the sword simply wouldn't form. The only way to bypass that restriction was during intense emotional situations, where the Sacred Gear responded directly to the user's desires rather than their imagination.
But combining both Demonic Power and Sword Birth? That was the real trick.
He had spent years refining the synergy between the two, using his Devil Magic to "fill in the gaps" where his knowledge lacked, while Sword Birth handled the actual creation—drastically reducing the strain on his reserves.
Of course, for all their versatility, he knew his swords would never truly rival named Demonic Swords. They simply lacked the raw power and durability to match weapons of that caliber. Though he did have an idea of how to get around this, he had been testing for years now.
After another minute or so of waiting, Koneko finished knocking out the last of Riser's peerage. She approached him, her face blank as always, but her body language practically screamed 'Praise me.'
Kiba chuckled, reaching out to ruffle her silver hair. "You did great, Koneko. I'll make everyone a feast when we get home."
She gave a small nod, a faint, satisfied smile tugging at her lips.
Not even a second later, the announcement rang out:
[Riser Phenex's Queen, Yubelluna, retired.]
[Riser Phenex's last Bishop, Ravel Phenex, retired.]
And just like that, the match was over.
Kiba stood up, stretching before he grabbed the Fire Devouring Sword and dismissed all the other still impaling Riser's body. Rias and Akeno descended onto the battlefield, landing gracefully beside them.
"That's everyone on your side, Riser," Kiba said, staring down at the battered Phenex heir. "Are you going to surrender, or do I have to beat it into you?"
A moment passed in silence, broken only by Riser's ragged breathing. His golden hair, once perfectly styled, was matted with sweat and dirt. With swords that had impaled him moments ago were gone, hisbloodied woundslit on fire and healed at avisible speed.
"Tch..." Riser spat blood to the side as he finished healing, his crimson gaze blazing with defiance. He clawed at the ground and pushed himself up onto his knees. "You think... this is over?"
Kiba tilted his head, watching him with mild curiosity.
"Of course. We've already won."
Riser let out a dry, humorless chuckle, finally rising to his feet. He staggered but forced himself to stand upright, swaying slightly as he glared at Kiba with burning fury. A moment later, he finished healing andstabilized himself.
"You should have finished me when you had the chance. Do you think your little tricks make you stronger than me? I am Riser Phenex of the House of Phenex! My flames are eternal! I won't fall to some low-born mutt with cheap, gimmicky swords!" Riser snarled.
He looked down at Riser and chuckled, "You think I need tricks to beat you?"
He originally thought he did when he compared himself to Rias. After all, he was barely able to match Rias and Rias couldn't beat Riser in canon, how would he be able to do so without any tricks?
What he failed to take into account was that he wasn't the only one who grew stronger over the years. Through his constant challenge, Rias had to push herself in order to not let him suppress her and as a result, she ended up a lot stronger than her "canon counterpart". He never realized this because they only train and spar amongst themselves. It was until he fought Riser that he realized how much he had grown.
"Alright," Kiba said softly, his voice like the calm before a storm. "No tricks. No traps. Just you and me. Let me show you how outclassed you really are."
Riser's eyes narrowed. "You think you can defeat me without your cursed swords? Fine. I'll—"
Kiba interrupted with a slow, mocking grin. "Oh no. I'm still using a sword. I'm a knight and swordsman after all. Just one though. And I'll even give you a preview."
The giant sword in his hand broke apart. He raised his hand which crackled with energy. The swords he had used earlier had absorbed the fire Riser had thrown at him during their fight, storing it like a battery. Now, that energy surged through Kiba's body, his aura flared with a dark red and violet glow.
The energy coalesced in his outstretched hand, twisting and writhing like molten steel being forged. Slowly, it began to take shape—a long katana with a deep black blade that seemed to drink in the surrounding light. The guard was simple, elegant, and shaped like a pair of wings, while the hilt was wrapped in dark blue silk.
"This sword's name is Yamato," Kiba announced. His grip tightened around the hilt as he lifted the sword, the polished black steel gleaming ominously. It looked almost nothing like the original blade it was based on, but it does have a similar power.
"Do be careful. This sword can cut space." Kiba demonstrated it by taking a swing, "I have no idea how it would interact with your regeneration nor the Rating Game's teleportation system."
A ripple of distorted air shimmered where Kiba's blade had cleaved through space itself. The tear lingered for a moment before stitching itself back together, as if reality itself struggled to undo the cut.
"You're bluffing," he spat. "A trick, an illusion. You can't seriously expect me to believe that thing actually—"
Kiba barely moved, just a flick of the wrist, but the speed was too fast for Riser to see. Riser's right arm fell off at the shoulder.
"I don't bluff," Kiba said in a lazy tone as if none of this required effort.
Flames erupted from the stump in an attempt to heal it, but the cut in space prevented it from closing. Blood sprayed everywhere as Riser staggered, clutching at the wound. It was only after he moved away from the cut in space that his arm could heal.
Kiba watched him with mild interest as if studying an experiment. "Looks like your regeneration has limits after all."
Riser let out a strangled growl, shaking his head violently. "No! I am Riser Phenex! I will not fall to some... some nameless knight!"
"Nameless?" Kiba tilted his head in amusement. "You're lost to Yuuto Kiba, remember it."
Riser bared his teeth and let out a roar, wings of fire flaring behind him. He conjured a giant fireball overheadand launched it at Kiba.
"Dieeeeee!"
Kiba smirked. Yamato's edge cut through the air and reality itself seemed to split apart. A thin black line carved through the incoming flames.
And then, as if obeying some unseen law—
The fire vanished.
Gone. Erased. Like it had never existed.
Riser's eyes went wide. "What—"
Kiba was in front of him before he could finish. The katana's blade cut through the air with effortless grace, slicing downward in a perfect arc, and for a moment, nothing happened.
Then—
Riser gasped, his body jerking violently as an invisible force ripped through him. A deep gash ran from his collarbone down to his waist. His flames flickered wildly, but they couldn't heal through the cut in space.
Rise coughed up blood before his upper body fell backward and his lower body fell forward onto the floor. The cut in space sealed itself before both halves of Riser's body were surrounded by lights andvanished.
Kiba signed in relief, not because of the fight but because he saw Riser starting to heal before he was taken away. That means he didn't just kill a son of a Pillar House. While he was sure Rias and her brother Sirzechs would protect him even if that was the case, it would have brought more trouble than it was worth.
He thought Riser would dodge his attack, he even deliberately lowered his speed just so Riser could do so. Who would have expected the guy to stand still even after seeing what his sword could do?
[Riser Phenex has been retired.]
The announcement echoed through the arena.
The fight was over.
Koneko walked over and looked up at him with stars in her eyes.
"…That was cool," she muttered.
Kiba chuckled, ruffling her hair. "Glad you think so."
Rias and Akeno arrived shortly after, their expressions a mix of awe and exasperation.
"I knew you were strong, but that was ridiculous," Akeno mused, smirking as she folded her arms. "Did you really need to humiliate him that badly?"
Kiba shrugged. "He had it coming."
Rias exhaled, shaking her head. "I'm just glad it's over. Now we can finally move on without that stupid engagement hanging over my head. Thank you, Kiba."
"There is no need to. You said it yourself. Your peerage is your family, right?This is just me protecting my own."
She smiled and nodded. "That's right."
Kiba chuckled, "We should get home soon. I owe Koneko a feast."
The team chatted and laughed, any tension that they had before the fight broke as they left the battlefield victorious.
Kiba's first thought upon waking up was that he felt unusually warm.
The second was that something soft—very soft—was pressed firmly against his chest.
The third was that he could feel smooth, bare skin against his own. He wasn't unfamiliar with the feeling of a naked body pressed against him in the morning after all those nights with Koneko but this felt different.
His eyes cracked open, and the red strands of hair draped across his pillow confirmed what his senses already told him.
Rias.
And she was naked.
Her body clung to his side, her arm draped lazily over his stomach, her soft breath tickling his collarbone. One of her legs was hiked over his, her smooth thigh resting against his own, the curve of her body molding against him as if she belonged there.
How the hell did this happen?
He distinctly remembered going to sleep alone after last night's celebration. The team had partied late into the evening, eating, drinking, and basking in the satisfaction of their overwhelming victory over Riser. Rias had been ecstatic, finally free of her engagement, and Akeno had gotten a little too enthusiastic with the wine.
But Kiba? He had definitely gone to bed alone.
Carefully, he tried to shift and moved to get up, but the moment he moved, Rias let out a sleepy murmur and hugged him tighter. Her full, soft breasts pressed into his side, her breath slow and steady against his skin.
His body reacted—of course it did.
'Not the time,' he told himself, taking a slow, controlled breath.
'Okay. Think. Had she sleepwalked? Had she gotten drunk and stumbled into his bed? …Or had she done this on purpose?' He sighed. Knowing Rias, it was definitely the third option.
Kiba hesitated, debating whether to wake her up. On one hand, things needed to be clarified first. He was already with Koneko and while the catgirl didn't mind sharing in "canon", he doesn't want to make assumptions here. On the other…
He had a habit of sleeping in his boxer only so he could feel every inch of her—the smoothness of her toned stomach, the soft swell of her breasts against his arm, the curve of her thigh draped over his own, her bare skin was warm against his. She felt nice. And if he was being honest… a part of him didn't mind this at all. It would be a lie to say he didn't find her hot.
His cock, stubborn and unapologetic, had hardened beneath his boxer and pressed up against her thigh. He cursed himself for not having better control, but with her body wrapped around him, her warmth soaking into his skin, it was inevitable.
Then, he felt it.
'Crap...'
The slightest shift. The slow movement of Rias's fingers grazing his stomach. Her fingers traced lazy, featherlight circles along his skin before sliding lower, creeping beneath the sheets.
'Wait—'
His muscles tensed, his mind racing.
Then—warm, delicate fingers wrapped around his cock.
His whole body froze in response, but before he could say anything, Rias moved.
Her head lifted from his chest, crimson hair cascading down her bare shoulders, framing her bountiful breasts, and her sapphire eyes—bright, very awake—met his with a knowing gleam.
"Good morning, handsome?" she murmured, her voice a soft, teasing whisper.
Kiba swallowed.
"Rias—"
She cut him off with a slow, deliberate squeeze of his cock. His breath caught in his throat.
"I was content with cuddling while pretending to sleep," she continued, her fingers stroking along his length with an agonizingly slow rhythm. "But I felt when you got hard." She smirked, shifting her body against his, pressing her soft, naked breasts into his chest. "So I figured… why pretend anymore?"
"Rias…" His voice was strained, a warning, but she only smiled.
"Shhh," she whispered, lips brushing his jaw. "Just relax."
Kiba's breathing grew heavier as Rias's fingers moved with sinful expertise. Her touch was slow, teasing, her soft palm gliding up his length before easing back down in a steady rhythm designed to break his composure piece by piece.
He should stop this. He should say something, do something, but every rational thought crumbled beneath the heat of her touch.
Rias pressed closer, her lips dangerously close to his. "You're so tense, Kiba," she purred, her voice carrying that unmistakable, sultry amusement. "Is this really making you that nervous?"
He swallowed hard, his jaw tightening as her pace increased, still slow and controlled, but undeniably with more effort.
Kiba let out a sharp exhale through his nose and managed to compose himself for a moment, "Rias… I don't think-"
She silenced him with a kiss. It caught him off guard, his eyes widening as her soft and warm lips pressed against his, cutting off whatever he was going to say. It wasn't rushed. It wasn't desperate. It was slow, sweet, and sensual, and despite the urge to pull away, Kiba found himself leaning in.
She lingered, savoring the contact, her hand never stopping its slow, deliberate strokes along his length. When she finally pulled back, her sapphire eyes met his with quiet intensity.
"I know what you're thinking," she murmured, "You're worried about Koneko."
Kiba was worried. Even through the haze of pleasure, the worries gnawed at him. He and Koneko had never defined their relationship in strict terms, but this—this felt like crossing a line.
"She already knows," Rias whispered. "We talked before I came here."
Kiba blinked. "You… what?"
Rias giggled, resting her forehead against his. "You're so sweet. You really thought I'd do this without making sure first?" She said as her finger traces circles over his chest. "Koneko already knew and decided to give us some privacy."
"She did?" He asked. His mind struggled to catch up. Having all this happen first thing in the morning wasn't exactly conductive for logical thinking.
"Mhm." Rias nodded, "Would she have left you alone after yesterday if she didn't?"
Kiba closed his eyes and sighed, "I guess not."
"Exactly," she replied, a hint of satisfaction in her tone. "So, are you going to lie there like a dead fish or are you going to show me what you did to make Konekoscream all night these past weeks."
Kiba could feel his face flushat her words. He thought they were being secretive about their "get-togethers" but it seemedthey were noticed from the start.
Rias pushed herself off him and dragged him on top of her as she laydown, her crimson hair spread out beneath full body was on display before him.
"Well?What are you waiting for?"Riaspurred. "Come and take me."
Rias was offering herself to him and Koneko had allowed lips crashed into hers, the heatinside him ignitedintoaraginginfernoat the thoughtand he was moving before he knew moaned against his mouth, her legs instinctively wrapping around his waist, her body arching into his.
Rias melted into Kiba's kiss, her soft lips parting as he deepened it, claiming her with a hunger that had been restrained for too long. His hands roamed her body, fingers gliding over smooth, bare skin, memorizing the shape of her curves as she pressed against him.
She responded with just as much urgency, her hands exploring the hard muscle of his back before sliding into his hair, tugging him closer. A soft moan escaped her lips as his tongue slipped past hers, their breaths mingling.
Kiba's hands trailed downward, over the dip of her waist, the swell of her hips. His fingers skimmed the soft skin of her thighs before squeezing, pulling her legs tighter around him.
Her fingers traced down his torso, appreciating the hard lines of his body before slipping lower, running over his stomach, teasing the space just above where she wanted to touch.
Kiba dipped his head, trailing kisses down her jaw, her neck, sucking lightly at her pulse. Rias gaspedas he kissed her neck, one of her hands cupping the back of his head, the other playing along his cock. She could feel him throb beneath her palm, the hardness pulsing in response to the heat of her touch. His mouth trailed across her collarbone, his tongue tracing the delicate skin of her shoulder. Rias arched into him as he reached her chest, his mouth closing around one hardened peak. He flicked his tongue over it, drawing a sharp gasp from her lips
"Kiba…" she breathed, her voice laced with need. Her hand clinched around his cock but not enough to hurt.
He groaned in response, his free hand sliding between her thighs and fingers teasing along her folds, making her shudder.
She was already so wet. The heat between her legs burned hotter with every second, her body aching for more.
Kiba's fingers slid against her lower lips, parting her folds as he traced along her entrance. She shivered beneath him, her thighs twitching as his touch sent jolts of pleasure up her spine when a finger slipped inside her. Her breath hitched, her chest rising and falling with each slow, deliberate movement of his fingers.
"Kiba…" her voice was breathy, her grip on him tightened.
Kiba continued to gentle kiss and suckat her breastswhile he pushed a little deeper, his finger sinking into her, feeling the tight, hot hole clench around him. She moaned softly, her legs parting more, giving him better access. His hand moved slowly, fingers sliding in and out, each stroke deep and unhurried, letting her feel every inch of the intrusion.
He curled his finger inside her, pressing against a sensitive spot that made her cry out, her hips jerking in response. Her walls clenched around him, pulsing with every slow thrust of his hand. Rias buried her face in his neck, panting softly as she rolled her hips to match his rhythm.
It took her a moment but shemanaged to take a shaky breath andstarted moving her hand. She pumped him slowly, her palm gliding over his shaft, feeling the heat of his rod in her hand.
They moved in sync, their bodies melding together. Her hand squeezed and stroked, and his finger pushedin and out. They could feel their breathing grow ragged as their pace quickened.
Kiba moved up, capturing her lips again. He kissed her deeply as his fingers pressed deeper, his thumb rubbing slow circles over her clit. Rias whimpered against his mouth, her body trembling as pressure coiled tighter inside her.
She was close.
And so was he.
Rias suddenly stopped.
Her fingers slipped away from his cock, her grip loosening as she pulled back just enough to meet his gaze. Her sapphire eyes burned with heat, her cheeks flushed, her lips slightly parted as she panted softly against him.
Kiba's hand stilled between her thighs, fingers still buried inside her warmth, feeling the way her walls pulsed around him. His breath was ragged, his chest rising and falling in sync with hers, his cock aching from the way she had been stroking him just moments ago.
"…Why did you stop?" His voice came out lower than he intended, husky and strained with the effort to hold himself back.
Rias gave him a lust filled smiled. Her fingers trailed up his stomach, tracing over his toned muscles as she slowly wrapped her arms around his neck. She pulled him down until her lips brushed against his ear, her breath hot and teasing.
"Because I want you to finish insideme," she whispered, her voice soft, sultry."Fill me upwith your cum."
Kiba swallowed restrainthe was holding on to body movedon instinct, his fingers pulling out of her. He shifted his hips, lining up with her entrance as her legs wrapped around him again.
The moment he pressed the head of his cock against her pussy, Rias's legs squeezed his waist and she pulled him into her. His dick slid inside her in one smooth stroke, filling her tight hole in its entirety.
"Nnnh-" she moaned into his ear. Her inner walls contracted around him, her hot,wetdepths squeezing him hard. Kiba held his breath, feeling every inch of her pussy wrap around him. He held himself there for just a moment before his hips began to move, slowly drawing back before pushing into moved with a slow, steady pace, his hands gripping her hips to steady her.
"Ahhh- Nnnn- Ah-" Rias groaned, her breathy moans drowned out by the wet, rhythmic slap of their hips meeting. Her back arched into his chest, her breasts bouncing with each buried her face in his neck, muffling the needy, desperate cries that fell from her lips with every motion.
His thrusts grew harder and faster as the heat between her legs grew hotter, her wetness slicking his cock, letting it move easier with each plunge.
"Kiba—aaahh-" she whimpered into his ear. "So good- So deep-"
They were already close before and were rapidly approachingthat precipice once again. Riascould feel hiscocktwitchinginside her, his breathing quickening against her neck. She clung to him tighter, her legs squeezing him harder.
"Doit," she whispered, her voice a pleading whimper. "Cum inside me,Kiba."
He didn't have to be told twice. Kiba grabbed her ass and squeezed, thrusting as hard as he could. Rias gasped in shock, her back arching and her body tensing as she felt him slam into her at the deepest angle, the head of his cock pressed up against her cervix. His fingers dug into the soft flesh of her assashe drove into heronelast , thickcum filled her pussy, shooting deep into her womb.
"Nnnnnngghh-" she whimpered as her whole body seized sudden rush of warmth in her core pushed her over the edge. Her walls clamped down around him, milking every drop of his seed with an almost desperate fervor. Hermind blanked out in pleasure for a moment as herbody shuddered and spasmed with the intensity of her climax.
For a moment, they stayed there, locked in that intimate embrace as their orgasms ebbed and flowed through their entwined bodies. Kiba's weight pressed down on her, his breath hot and heavy against her neck, his cock throbbing inside her, and her walls pulsing around him. Their breathing slowly returned to normal as they held each other tightly.
"Rias," Kiba breathed against her neck, his voice rough and low. "I-"
She shushed him with a gentle peck on his lips, her fingers trailing through his hair. She could feel him soften inside her, his cock slowly slipping out. The warm trickle of his cum leaked from her folds.
"More~" she murmured, her voice heavy with need."Give me more~"
She rolled them onto their sides before lifting herself up and straddling him. This give Kiba full view of her naked body, from her lustful gaze to her heaving breasts to the mess of cum dripping from between her legs.
Just like that, his cock was rock hard again.
Rias grinned. She grabbed his cock and lifted her hips before lining the two up. She sank down, impaling herself on his cock again, her pussy swallowing his length to the hilt.
"Mmmmmm," she moaned as she felt him fill her again.
'Ah... I now have another nympho I need to satisfy.' Kiba realizedwith a mix of resignation,amusement,and arousal.
What a troublesome life he had.
A/N: For anyone wondering, Kiba is currently at the peak of High Class. With his Yamato, he could be considered Low Ultimate.