Midnight Anal Training
Roen was absolutely convinced that Echidna would never do anything to harm her. Yet, despite her naive trust, once Echidna set her mind to applying the aphrodisiac, Roen's anus was completely developed and sensitized by the afternoon of the sixth day.
"Ha, haha..." As usual, Roen woke up slightly earlier than Echidna and slipped back into her own bedroom. She then dragged her full-length mirror over, lay on the bed curled up like a shrimp, and bent her legs into a sharp L-shape.
In this position, her anus was naturally reflected in the mirror. By slightly lifting her upper body and placing her hand on her butt crack, she could easily insert a finger—a basic piece of anal masturbation trivia that Roen had somehow managed to master.
"How strange. Is it getting more sensitive just because I'm focusing on it?"
In reality, thanks to the aphrodisiac Echidna had diligently applied, Roen's anus had been perfectly remodeled into a greedy back pussy that could greedily suck in anything pushed inside. And Echidna fully intended to claim Roen's back-pussy virginity this very night.
"Wow... It really looks like a pussy..." Roen marveled quite innocently at her own lovely anus. Drenched in the aphrodisiac, it pulsed and twitched rhythmically like a soaking wet vagina. The naive Roen assumed every woman's anus behaved this way, inwardly admiring it and thinking that people didn't call it a back pussy for nothing.
"Just a little... just a tiny bit, ahhn..." For the first time, Roen began to venture into the depths of her anus—a passage she had naturally stopped using for its original biological purpose a few days ago. Squish, squish. Her flesh made wet, friction-filled sounds as she pushed inside.
"Hngh..." Covering her face with her free hand, she silently savored the sensation of her index finger sinking up to the first knuckle inside her anus.
"Haaah... This might actually be even more than my pussy..." She couldn't even finish her sentence before her body shuddered, sending her into a light, trembling climax. And she was right about the sensitivity. No matter how responsive Roen's body had become from her frequent lovemaking with Echidna, nothing could compare to the raw sensitivity of a back pussy that had been thoroughly pickled in aphrodisiacs, turning it into a one-hundred-percent pure fleshlight.
"Ah, this is... seriously..." Roen curled her body tighter as her finger pushed deeper, but unfortunately, doing so only intensified the pleasure.
"Hah..." When she curled up, her finger was naturally coaxed outward. Every time her anus—saturated with the aphrodisiac—spasmed and spat her finger out, it delivered an exquisite jolt of ecstasy.
"Hnghh...♡" Drooling thick, pleasure-laced saliva onto the bedsheets, she slowly withdrew her finger. Finally, a soft, wet pop echoed in the quiet room. The lingering effects of the aphrodisiac had raised the temperature around her hips, causing her to sweat profusely down there, which perfectly substituted for love juice.
"Ha, haaa..." Roen panted, feeling a unique, tingling pleasure course through her entire body. The anus was similar to the vagina, yet distinctly different. If the vagina was like an innocent girl who naturally tightened and adapted to the movements of whatever entered her, the anus was like a cynical office lady who refused to cater to her partner's pace. Of course, since both of these traits now resided within Roen's single body, the comparison was ultimately trivial.
"Mnh, ah..." Burying her face in the sheets, Roen resumed her masturbation, starting carefully from the folds of her anus. She felt she had rushed the insertion too quickly just now. Like soothing an angry lover, she began to gently coax the outer edges first.
"Hngh, so good..." After calmly and softly caressing the pale pink folds, Roen slowly began to venture back into the world of her anus. Of course, it was her finger, not her foot, making the journey.
"Hngh..." The moment she hooked her finger like a claw just inside the rim and pulled outward as if trying to drag the inner flesh out, Roen shuddered violently, as if struck by an electric shock. Anal masturbation was incredibly intense. The human body naturally has little immunity to such raw pleasure, making it easy to succumb. But for Roen, whose erogenous zones were already being systematically developed, the addition of the aphrodisiac made it feel so good she wondered if anal masturbation was actually more pleasurable than sober sex.
"Hngh..." Having enjoyed herself thoroughly with one finger, Roen slyly attempted to slip a second one in.
"Oh, wait...?" Roen's eyes widened in surprise as the fingers slid in much easier than expected. Normally, forcing a back pussy to accept two fingers at once should have been accompanied by the painful sensation of the tight opening stretching apart. However, Roen's back pussy was so thoroughly saturated with the aphrodisiac that she couldn't feel any pain at all.
"This easily?" Though she was shocked by how effortlessly her back pussy stretched open, she failed to realize the gravity of the situation.
"How fascinating..." Staring into the mirror at her own anus—which had stretched a finger's width wider than it had been this morning and now pulsed emptily after her fingers were withdrawn—Roen...
"...I guess everyone is like this?" ...couldn't bring herself to harbor any suspicion. To Roen, a woman's body was still a strange yet familiar thing. She simply laughed it off, assuming this was completely normal.
Meanwhile, that night.
"Alright, shall we begin?" Having put Roen to sleep as usual, Echidna solemnly adjusted her partner's sleeping form into a hands-and-knees posture. She then placed her hand over Roen's cleft, guiding her thick fingers toward the upper opening. Since Echidna was naturally larger than an average human, her fingers were significantly thicker than those of a human woman like Roen.
"You can handle a finger easily by now, can't you, Roen?"
"Mnh, ngh..."
"Fufu, look at you answering so well." Normally, Roen's tight opening would have rejected such thick fingers, but thanks to her diligent morning masturbation sessions over the past few days, her anus naturally welcomed Echidna's fingers, no matter how thick they were. While lube would have been necessary before, the side effects of the aphrodisiac had turned her anus into a sweat-prone passage, rendering lube practically obsolete.
"How does this feel? They say this is the G-spot. Once we start using your pussy too, I'll knock on it with my tip so hard it'll feel like it's breaking. Haaah, I really want you to see my jaji soon, Roen. I wonder when would be best..."
"Hngh, mmm..."
Echidna pressed firmly against the wall separating Roen's anus and vagina, precisely stimulating her G-spot. Applying the aphrodisiac until both her G-spot and anus were thoroughly saturated had certainly paid off. How would Roen react when this pussy and anus were finally stuffed with a real jaji?
"Honestly, since we're already sleeping in the same bed, maybe I should just show you my jaji next month?" Echidna was highly curious about Roen's reaction, and she felt the time to reveal her secret was drawing near. They slept together, Roen didn't even bat an eye when called "wife," so it seemed perfectly fine to finally whip it out.
"Well, let's finish up with your anus first." Retracting her penis-covering scales, Echidna let her signature, monstrously thick member dangle as she paced around the room. She grabbed a bottle of lube and returned to the bedside. Then,
"Mm-hmm, hm~" Humming to herself, she slathered a generous amount of lube onto her jaji. Inserting a penis into an anus wasn't particularly unusual for those with certain preferences, but preferences aside, Echidna's natural size was simply too massive. She had to apply plenty of lube to ensure Roen's anus wouldn't be completely torn apart.
"Alright, I'm going in now." Even though she knew Roen couldn't respond, Echidna gave a quiet warning. She lowered Roen's legs from her hands-and-knees position, wrapping her serpentine tail around them to lock her in place. It was a highly flexible position that only a Lamia like Echidna could pull off. Pressing her glistening, lube-slicked tip against Roen's anus, she began to push inside.
"Here it comes."
"Ngh..." Unsurprisingly, accepting Echidna's fist-sized tip was no easy feat. Even in her unconscious state, Roen frowned and let out a pained groan. Amidst her whimpers, a wet, stretching squelch echoed as the tight opening was forcibly pried open by the massive head. Since Echidna's tip was only slightly smaller than a woman's fist, this was essentially equivalent to a full-on fisting session for Roen, who had only just toyed with two fingers this morning.
"Ah, ohh..."
"Phew..." Once that colossal jaji had buried itself completely inside Roen's anus, Roen gasped heavily in her sleep. Echidna shuddered with intense ecstasy, thrilled by the realization that she had finally conquered Roen's anus.
"I'm inside." Echidna was a virgin. She was a virgin in every sense of the word. Though she had enjoyed plenty of sexual play with Roen, her own hymen remained intact, and despite her countless nights of somnophilia, she had never actually inserted her male genitalia into a vagina. But now, by fully inserting her jaji into Roen's back pussy, Echidna had finally lost her virginity tonight.
"Now..." It was time to start thrusting in earnest.