I Can Purify Corruption Through Intimacy in the Apocalypse

After dinner, Seren proceeded with a Corruption assessment on Ava so she would have a reliable baseline for future comparisons.

Although Ava's Corruption level was low, it was still present, and as long as it existed, Seren could determine its percentage with near-perfect accuracy.

“So we'll be doing it together, then?”

Now fully returned to her usual self, Ava let out a sultry laugh and rested one hand on her hip.

Lucien's gaze shifted toward Seren.

She was standing near her desk with a notebook in hand, her brow faintly furrowed as she reviewed her observations.

“It's for scientific reasons.”

While she wasn't embarrassed, she couldn't deny that the situation felt awkward. Physical intimacy was normally something shared between lovers or couples. Approaching it as a form of experimentation felt unusual even for her, despite being the most scientifically minded person in the room.

“...Are you sure about this?”

Lucien's worried tone was entirely sincere, and his expression showed no trace of teasing.

Seren looked up from her notes.

“You don't need to worry.”

Her voice remained steady as she crossed the room and sat down on the bed.

Instead of her usual work clothes, she was dressed in a plain linen shift and a loose pair of drawstring trousers. The outfit was practical, comfortable, and entirely unremarkable. Combined with the conversation they were having, it made the atmosphere feel strangely surreal.

Ava seemed entirely unbothered by any of it.

Lucien wished he could say the same.

Seren set the notebook beside her and finally looked at the two of them.

“Let's test whether my Corruption level decreases more with all three of us involved in the process.”

The premise behind the experiment was fairly straightforward.

Ever since noticing that greater intensity seemed to reduce her Corruption more quickly, Seren assumed that involving a third participant—especially someone as experienced as Ava—might accelerate the effect even further. Since her Corruption level was the highest among them, she had essentially volunteered herself as the subject, asking the other two to focus on her so they could observe the results directly.

Lucien felt the corner of his mouth twitch.

This was definitely awkward...

On that point, at least, he and Seren were in complete agreement.

Unfortunately, he couldn't simply explain the actual reason the process was more effective. Doing so would require revealing information connected to the System, and that wasn't something he was prepared to share freely.

Granted, part of it would eventually need to be disclosed because of the contract he had formed with Ava, but that was a controlled situation with clear limits.

This wasn't.

Ava laughed again, already looking far too entertained by the entire situation.

“Don't worry,” she said, waving a hand dismissively. “I'll make sure it's very intense.”

The way she said it sounded threatening.

Seren's lips twitched.

“...Our contract prohibits you from harming me, in case you've forgotten.”

“Relax.” Ava grinned as she began hanging her rapier, stiletto dagger, and various other tools on a nearby rack. “You'll enjoy yourself. Leave it to the professional.”

Lucien let out a quiet sigh.

Sometimes he almost forgot this was only his second day in this world.

So much had happened in such a short span of time that it felt strangely unreal.

Shaking the thought aside, he removed his own weapons and cloak and placed them with the rest of his equipment.

“Hurry up.”

“Yeah, yeah,” Ava replied dismissively, her voice laced with a playful laziness as she closed the distance between them. She stepped toward Seren, her gaze sweeping over the other woman’s frame. “We can do whatever we want, right? As long as we don't actually hurt you.”

“Yes,” Seren answered shortly.

A slow, predatory smile spread across Ava's face. “Then spread your legs.”

Seren hesitated, her brow furrowing. “Can you not just do it yourself?”

“Open them,” Ava commanded. Her voice had shifted, becoming more intimidating and authoritative. The sudden change in tone sent a flicker of apprehension through Seren, serving to heighten Ava’s satisfaction.

“Ah, I almost forgot,” Ava purred, her eyes glinting. “I’m a bit of a sadist, and I like to play the dominant role in bed. But that’s fine, right? You said it was okay as long as I didn't physically injure you. Besides, this is exactly how we make the process intense—just like you wanted.”

“...I see.”

Seren sounded far less convinced than her words suggested.

After a moment, she turned toward Lucien, who had been quietly observing the exchange with an increasingly dry expression.

“Please stop her if she goes too far.”

A faint smile tugged at the corner of Lucien's mouth.

“Sure.”

The response seemed to satisfy Seren slightly, though not by much.

As for Lucien, he had already decided how he was going to approach this situation. The easiest way was to treat the entire thing as a role being played for the sake of the experiment. If he committed to that mindset, maintaining the right reactions would be far easier than if he thought of it as an ordinary intimate encounter.

At the same time, he kept part of his attention on Ava.

Someone, clearly, needed to make sure she didn't get carried away.

“Hey, hurry up and strip,” Ava urged.

Driven by Ava’s insistent pressure, Seren moved with visible reluctance. Her hands fumbled briefly with the drawstring of her trousers before she reluctantly slid them down, followed by her underwear. As her glistening, pale cunt was finally revealed in the dim light, Ava felt a small amount of drool pool at the corner of her mouth.

Seren was the type of person Ava usually found irritating. They’re too rigid and expressionless. That same rigidity, however, made Ava crave the act of breaking her. She wanted to see that composed mask shatter.

Ava climbed onto the bed, settling herself behind Seren as her legs instinctively wrapped around her waist, pulling Seren into an intimate cradle. She slowly pressed her index finger against the sensitive entrance, feeling the initial, tight resistance before deliberately sliding it inward.

“Nnh...” A soft, involuntary sound escaped Seren’s lips as her breath hitched a little.

“That feels incredibly tight,” Ava commented, her voice dripping with appreciative mockery. “Let’s add another finger.”

Seren bit down hard on her lower lip, her brown eyes squeezing shut as Ava inserted a second finger, stretching her slowly and firmly. Her breathing quickened noticeably, and a faint flush crept across her cheeks.

“How does that feel?” Ava asked, her fingers beginning a slow, deliberate rhythm. “You can tell me what you want.”

"Just... keep going," Seren managed through clenched teeth, her voice barely above a whisper. She refused to give Ava the satisfaction of hearing her moan. Every time her body threatened to betray her with a sound, she swallowed it down, her jaw tightening.

Ava noticed. Of course she did, and it thrilled her to the core.

“There you are,” Ava murmured, curling her fingers slightly inside Seren, searching for that rough patch of tissue she knew would undo even the most disciplined woman. "You're good at keeping quiet, I'll give you that much. But I wonder how long that lasts."

Seren's response was a barely perceptible shake of her head as she fought to maintain control.

Ava glanced sideways at Lucien, a silent invitation in her crimson gaze—and crocked a finger at him. Come here.

Lucien, who had at some point settled into the chair in front of Seren's alchemist desk, watched the scene lazily. He understood what was being asked without any need for explanation.

So now I’m needed, huh?

Setting aside any personal reservations, he moved to the foot of the bed.

“Get your legs out of the way, Ava.”

She chuckled and shifted, moving her tangled legs out of the way while keeping her slick fingers buried inside.

"Spread wider for me, Seren," Lucien said gently to her, his voice warm enough to cut through Seren's rigid composure.

Seren complied without protest, her thighs parting further under his guidance.

"Hey, why soft with her and not me?" Ava asked, a note of petulant curiosity in her voice.

"Why not?" Lucien responded simply.

Up close, the sight was striking—her pink folds glistening with arousal despite her best efforts to suppress it, Ava's fingers already slick as they worked in slow, twisting motions.

Lucien leaned down, pressing his lips against Seren's inner thigh first. The warmth of his breath ghosted over her hypersensitive skin, drawing a barely suppressed tremor. Then, with deliberate care, he placed his mouth directly against her slit and dragged his tongue upward in one long, unhurried stroke.

"Aa—!" Seren's eyes flew open wide as she gasped, the sound ragged and involuntary. A sharp, reflexive jerk ran through her hips, her body tensing. She immediately clamped down on the burgeoning noise, pressing her palm hard against the mattress to anchor herself. "Don't—my leg was just cramping," she managed, the lie sounding thin even to her own ears.

Ava let out a low, satisfied snort, tilting her head back to watch the display. "Sure it was," she echoed, her tone dripping with playful condescension. "You're doing a magnificent job of pretending that's all happening internally."

Lucien kept his focus absolute, maintaining the steady, rhythmic pressure of his tongue. His movements shifted subtly from long, slow strokes to rapid, teasing circles, mapping every sensitive point within her wet, pink entrance.

The combined assault—the deep, internal friction from Ava’s fingers meeting the soft, expert suction and licking from Lucien’s mouth—was too much for Seren's tightly controlled facade.

Her breath hitched again, this time it wasn't a sharp gasp but a drawn-out, shaky intake of air. Her core muscles tightened involuntarily around both of them. Her knuckles, gripping the sheets, turned stark white.

Ava, sensing the shift in energy, increased the pace of her own handwork, matching the intensity of Lucien's ministrations. Her index and middle fingers began to move in synchronized, swirling motions, digging slightly deeper.

"Is it still just cramping?" Ava whispered conspiratorially near Seren’s ear, leaning in close enough for Seren to feel the warmth of her breath, despite the attempt at stoicism.

Seren tried to speak, to offer a convincing denial, but only a strained, breathy sound escaped her throat. "Nnngh..."

Lucien seemed to register the escalation. He momentarily paused the aggressive circling with his tongue, letting the sensation build into a dizzying peak, before diving down again with renewed fervor. Circling Ava's fingers, Lucien teased the very edge of her aching clit with the tip of his tongue, applying enough direct, insistent pressure to make her entire body shudder and quake.

"Nhn~!"

Seren squeezed her eyes shut, a bead of sweat tracing a path down her temple. Her lower lip began to tremble visibly. She was teetering, balancing on the knife-edge of release.

Ava noticed the tell-tale signs instantly. "Oh, getting close, are we?" she cooed, her voice a sultry, husky murmur against Seren's cheek. "Your body's telling on you, little alchemist."

As if to prove her point, Ava's movements became noticeably faster and more forceful. Her fingers, already slick with Seren's copious juices, flew inside her with a brutal, relentless pace. Each thrust was angled perfectly, ramming into that secret, electric spot inside Seren with unerring, punishing accuracy. She fucked her with a speed and intensity that stole the air from Seren's lungs, leaving no room for thought or denial. In terms of pure, mechanical speed, she easily outmatched Lucien.

Lucien, witnessing this display of dominance, felt a brief surge of surprise and wry amusement. He had guessed she was experienced, but her sheer, focused aggression was impressive. He adjusted his own approach accordingly, shifting from broad, overwhelming strokes to precise, targeted attacks. He sealed his mouth directly over Seren's lower slit, creating a tight, suctioning vacuum as his tongue began to flick and vibrate with blinding speed. It was a direct, merciless assault designed to push her over the final ledge.

"Nhnghhh!"

The combination was devastating. Seren’s carefully constructed walls were crumbling under the sheer, overwhelming force of their combined expertise. Her mouth fell open in a silent, desperate scream, her spine arching violently off the bed as if trying to reach a higher plane of ecstasy. Her hands tore away from the sheets, flying instinctively to her own breasts through the fabric in a frantic attempt to anchor herself against the tidal wave of sensation. Her hips lifted, a desperate, rhythmic motion, pushing against Lucien’s face and Ava’s insistent fingers in a pleading, begging cadence.

"Yessss," Ava breathed, her eyes gleaming with triumph. "Take it. Take everything we give you."

"~Hnhgh—!!"

Seren’s entire body went instantly rigid, poised precariously on the absolute precipice of collapse. Her mind went blank, wiped clean by the blinding, cataclysmic pressure building deep in her gut. She was seconds away from being irrevocably shattered.

Then, her release came. Not as a gentle wave, but like a lightning strike—sudden, violent, and utterly uncontainable.

Splurt!!

Her entire body convulsed, limbs thrashing wildly beyond her control as a massive seizure of pleasure claimed her. Her thighs clamped down with bruising force, trapping Lucien’s head and Ava’s wrist against her trembling pelvis as her cunt clenched and spasmed rhythmically around the invading fingers.

Through it all, Ava watched the spectacle with rapt, hungry fascination, feeling every frantic flutter of those tight, velvety walls as they gripped and released around her digits. A slow, deeply satisfied smirk stretched her lips.

"There you go," she whispered, her voice laced with possessive pride. "That's what happens when you let go."

Lucien pulled back just enough to breathe, his chin and lips glistening with Seren's juices. He looked up at her spent form, her chest still heaving with ragged breaths. Her eyes were glassy and unfocused, a deep flush spreading across her skin like wildfire. A strand of drool connected her parted lips to Ava's shoulder, a testament to the intensity of their combined assault.

Seren lay there in the wreckage of her own composure, looking thoroughly, completely undone. Several seconds passed before she remembered to breathe properly, and when she did, it came out as a shaky, unsteady exhale.

"...Okay," she managed finally, her voice hoarse and small. She brought one arm across her forehead, covering her eyes. "That was..." She trailed off, unable to find words adequate enough to describe the sheer, overwhelming pleasure they'd inflicted upon her.

Ava withdrew her fingers slowly, examining them with an appreciative gaze before bringing them to her lips and sucking them clean. "Data point recorded," she announced cheerfully. "Corruption levels should have dropped significantly."

Lucien sat back on his heels, running a hand through his disheveled hair. "Well, that's good," he said, glancing at the faint shimmer of Seren's Corruption meter—now noticeably dimmer than before.

But as he processed this information, he felt Ava's gaze settle on him, a heavy, intent stare that was previously directed at Seren now focused on him. It was clear what she wanted. Lucien could only smile dryly.

"Want to do it?" he asked, the question hanging in the air like a challenge.