Midnight Anal Training
"Mmm..." Echidna had scurried off to the kitchen, her serpentine lower half sliding in a hurry as she promised to get breakfast ready. I, however, found myself unable to follow her right away. It wasn't because I suddenly felt the urge to put on some clothes. The desert heat was oppressive enough that even being completely naked barely offered any relief. I had fully intended to eat just like this, but...
"Anal...? Hmm..." I was utterly bewildered, unsure of how to react to Echidna, who had gone so far as to whip up a defecation-stopping drug just because she wanted to use my backside. I mean, really...
Is this really okay? Just moments before stepping in here, I had been worrying about how my body was slowly being remodeled. And now, a body that doesn't even defecate? Well, she did say my urination would increase, so it wasn't like my body would stop excreting waste entirely. But at the very least, my anus would be completely freed from its original function. It would essentially become a sterile, always-ready back passage.
"Doesn't this make me a literal human sex doll...?" My front pussy was already like an automatic door. I technically still had a hymen, but whenever Echidna used her tongue, she could caress me all the way inside. My clit was so swollen that it constantly peeked out from the folds of my labia; I could barely remember the last time it was hidden beneath its hood. My mouth was no different. Whenever Echidna pressed her pussy against my face, I sucked it. When she inserted her fingers, I sucked them. I was basically a dedicated finger-and-pussy washer for her... And now, even my anus was being remodeled into a sterile back pussy just for her convenience.
"Ugh..." The feeling of becoming a living, breathing sex toy was deeply unsettling. But...
"Sigh, it's not like I haven't received a lot from her..." It felt wrong to just flatly refuse. The menstruation-stopping medicine was Echidna's idea, but in the end, it was for my own comfort. Even when it came to my burns, she had saved my dying self out of pure, one-sided kindness. Shouldn't I back down just this once and cater to her whims a little? That was the thought creeping into my mind. Besides...
"And... I am a bit curious about what anal feels like..." Maybe it was because I'd been having so much sex lately, but I couldn't help but wonder if those degenerate adventurers back at the guild were telling the truth when they giggled and bragged about the wonders of the "back pussy." Was a back pussy... really like a real pussy? If she touched me there, would I lose my mind and climax just like when my front was stimulated?
"Hmm..." It wasn't that I actively wanted to train my anus; it was pure curiosity. Just innocent, scientific curiosity. I wasn't letting Echidna drag me around by the nose; I just wanted to know what it felt like. I had never cared about this sort of thing back when I lived at the adventurers' guild, but Echidna had gone out of her way to craft a custom drug just to keep my backside clean for me.
"Maybe just once, if only to appreciate her effort...?" Was this medicine worth trying at least once? The thought kept bubbling up in my head.
"Yeah, let's just take it once. Just this once." I could always stop and let my body return to normal afterward. Yes, yes, that's exactly what I'll do. Rationalizing it to myself, I headed toward the kitchen where Echidna was cooking.
"Huh? No, that won't work. You have to take it for at least a week for the effects to show."
"Ah, well..."
"Is it... really that bad? Should I just throw away what I made?" I hesitated slightly at the news that I had to take it for over a week, but seeing Echidna's large brown eyes welling up with disappointment made it impossible to refuse. My mind was already halfway made up anyway, and it was the first time I had ever seen her make such a vulnerable face.
"Alright, alright. I'll take it, but only for exactly one week."
"Yes, yes! Once your anus is clean, we can try having sex from behind, and if you like it, you can keep taking it."
"Sure, let's do that. We'll decide after seeing how it goes. We'll see." I could always just tell her I wanted to stop after a week anyway. Comforting myself with the thought that it would be easier to refuse later, I enjoyed breakfast with Echidna.
Roen had accepted Echidna's proposal. For Echidna, it was a joy that made her feel like she was walking on air. Unfortunately, it came with a catch: Roen would not continue taking the medicine unless she was fully satisfied with the results.
"She needs to take it for at least a month to see any meaningful results." This was an alchemical drug designed to semi-permanently alter her constitution. Although Echidna had formulated it to be highly potent, requiring Roen to take it three times a day for a high daily dosage, it was still a medicine that fundamentally altered her biology. Even by conservative estimates, it would take a month of consistent use. If her body didn't accept the drug well, it might even take over two months. Yet, she wanted to stop after a mere week?
"If she only takes it for a week, the effect will last a month at the absolute longest." No matter how potent the formula was, stopping before her body's biorhythms could adapt would render the whole endeavor pointless. It was like hair loss medication. If you took it for a month and stopped, you'd only suffer the side effects and lose more hair. If you took it for a year and stopped, the hair would start falling out again. But if you took it consistently for over ten years before stopping, your hair would grow just fine without falling out. It was essential to keep administering the drug until the body adapted to the new state and mistook it for its natural rhythm. The absolute minimum period Echidna had calculated for the defecation-stopping drug was one month. She had to make Roen take it for a month, by any means necessary. Once that milestone was passed, even if Roen wanted to back out, her constitution would have already changed permanently.
"Hehehe... It feels like it's been a while since I last touched Roen's sleeping body." Kekeke. Grinning slyly, Echidna opened the desk drawer in the bedroom to inspect the sex toys she would be using tonight. Everything inside was either a training tool designed for anal development or a homemade anal-training toy Echidna had crafted, thinking it would aid in her conditioning. All that was left was for Roen to come to the room and fall asleep.
"Echidna!" "Phew, Roen..." Echidna smirked, watching the white rabbit walk right into the serpent's den once again.
"I'm telling you in advance, sex is forbidden tonight. I'm just too tired."
"Of course, of course. You should definitely get some rest." This cheeky little white rabbit, declaring sex forbidden, still had no idea she was being thoroughly devoured every single night. Just looking at her made Echidna's penis throb with anticipation.
"Then how about we just share a goodnight kiss before sleeping?"
"Just for two minutes?"
"Sure, exactly two minutes." Grinning, Echidna pressed her lips against Roen's, immediately sliding her tongue inside to deepen the kiss. Pinned beneath Echidna, Roen shuddered as Echidna began to slowly secrete her sleeping poison along her invading tongue. It was a potent tranquilizer, capable of putting an elephant to sleep with a single drop. Roen, a mere pure human, stood absolutely no chance against it.
"Phew... I guess I really am tired. I'm already so sleepy. Hehe... So sleepy..." Exactly two minutes later, when Echidna pulled away, the external stimulation vanished, leaving Roen with no anchor to maintain consciousness. Within seconds, she drifted off into a deep slumber.
"If you're sleepy, you should sleep tight. Yes, yes." Smirking, Echidna walked over to the drawer, scooped up an armful of anal-training tools, and tossed them onto the bed. She then effortlessly stripped off the pajama pants of Roen, who had spent the entire day completely naked but had put on clothes before bed to act modest.
"Since we're going to use your anus, let's go with this pose tonight." Next, she adjusted Roen's body into a high-hipped cat pose, leaving her pale, pink anus completely exposed. It was marvelously beautiful, a flawless, unblemished rosebud that Echidna found absolutely exquisite.
"Cleanse." Just to be safe, Echidna cast her cleaning spell on Roen's anus. She then began slathering on sexual lubricant, preparing the tiny, tight opening. Unlike the vagina, which was elastic enough to birth a child, the anus was so narrow that even a single finger would struggle to enter. After meticulously applying the gel, she gently slipped a small pink bead inside. Next, she inserted a second pink bead into Roen's vagina—one designed to resonate with the first...
"Mmm..." The two beads resonated, beginning to vibrate intensely like a pair of egg vibrators. The principle was similar to the singing magnets Roen used to play with during her school days before being reincarnated into this world. However, the biggest difference was...
"With this, the foundation is laid for her pussy and anus to share sensations to some degree..." These beads were a type of low-frequency pulse generator. They vibrated gently, slowly building up pleasure in both her vagina and anus. And if she used paper tape to secure a third one directly onto Roen's clit...
"Perfect." The three beads entered a triple resonance, sending waves of pleasure through her clit, pussy, and anus simultaneously. If she repeated this training, a bizarre phenomenon might occur where stimulating Roen's clit would cause her to feel intense pleasure directly in her anus.
"Should I cum in her mouth tonight? It's been a while." Since she was employing this specific training method, Echidna couldn't actually penetrate Roen's pussy or anus, nor could she touch her clit during this session of sleeping rape. Settling for the next best thing, she returned to the basics, using Roen's limp hand to stroke herself as she began to masturbate. And the final destination for the massive amount of semen she would ejaculate tonight was, of course, Roen's mouth.