The Nipple Training
“Ugh… this… this is going to make me feel so pathetic… Where on earth did you even find something like this?” I muttered, scratching my head as I stared at the anal onahole, which was molded to the exact size of a real woman’s buttocks. Looking at this lewd object, crafted solely to satisfy a man’s carnal desires, I felt less aroused and more strangely repulsed. The silicone material, which felt eerily similar to human skin yet distinctly fake, triggered a sense of the uncanny valley. In any case, it wasn’t doing much for me. My cock was already exhausted from having ejaculated three times in a row, and looking at this thing only made me feel less in the mood.
Yejin lowered her head, glanced at my limp member, and muttered in dissatisfaction. “Ugh… you’re such a pain. How much more coddling do you need?”
“Hey, it’s not like I have a choice… we’ve been going at it without a single break…” As I grumbled, Yejin nodded as if she understood, then suddenly began stripping off her clothes from behind me.
“W-wait, what are you doing…?”
Instead of answering, Yejin took off her bra, baring her breasts, and wrapped her arms around me from behind. Her soft, heavy breasts pressed against my back, creating an incredibly pleasant sensation. “Ngh… oh…”
Yejin leaned her head out, looking up at me with a wicked glint in her eyes, and reached out to gently stroke my nipples. “…They say men feel good when you touch them here, too. How about it, Bom-i? Do you feel a tingle of electricity?”
“U-uh…? I don’t know… it just feels ticklish…” I muttered, feeling skeptical at first. But Yejin didn’t give up; she kept rolling and teasing my nipples. After a moment, a truly lewd sensation began to creep in. As my breathing grew ragged, Yejin whispered into my ear in a soft, sultry voice.
“…They say if you develop your erogenous zones, they become more sensitive… Let’s develop this spot too, starting today, okay? Then you’ll be able to feel twice as good…”
“Ah… ah… ha… ngh… w-wait…”
Sweat trickled down my body, acting as a natural lubricant. As Yejin rubbed my nipples and licked the line of my throat, goosebumps erupted across my entire body. It felt as if my whole being had turned into one giant cock. Naturally, blood rushed back to my member, and as it stood tall and rigid, Yejin pulled it toward the anal onahole. Finally, as my cock slid into the hole between the buttocks, I was greeted by an unfamiliar, tight sensation.
“Ugh…! Ngh… hng… ah…”
I instinctively gripped the realistic butt-shaped onahole and began thrusting my hips back and forth. Yejin held my back tightly, never stopping her rhythmic teasing of my nipples. “Ah… hng… ahh…”
“…How is it? Does it feel like you’re really putting it in a back door? Well, I suppose you wouldn’t know, since you’ve never tried it before…” Yejin teased, her voice playful. I didn’t say a word, just sweated profusely and thrust my hips with all my might.
Squelch, squelch, squelch, squelch… The anal onahole definitely felt different from the others; the entrance was incredibly tight, while the inside felt somewhat hollow. The surface was slick, and the elasticity was so good that it felt like I was truly exploring the depths of an anus—it was a bizarre sensation. But right now, the stimulation of Yejin’s fingers on my nipples was dominating my brain more than the onahole itself. Her fingers were moving up and down nearly three times a second, flicking my fully erect nipples. Every time her hand moved, a jolt of pleasure shot straight to the top of my head.
“Haa, haa, haa…! Ngh… ohhh…” As I threw my head back, trembling and moaning, Yejin kissed my earlobe and whispered, “Hehe, you like that, don’t you? Are you going to cum from your nipples? You’re so cute, just like a girl~ I’ll do this for you every day, so let’s keep developing them, okay?”
“N-no… ahh… hng… ugh…” I began thrusting my hips harder, becoming addicted to the nipple stimulation. With Yejin constantly whispering lewd things in my ear and her breasts pressed firmly against my back, I could feel her heart pounding against mine. Before long, the urge to ejaculate welled up again. Noticing that I was biting my lip and thrusting faster, Yejin realized I was close and moved her fingers even more rapidly.
Slap-slap-slap-slap-slap-slap… She was rubbing my nipples so fast that her fingers were almost a blur. Finally, as if hit by an electric shock, I spasmed, my hips and buttocks twitching uncontrollably as I reached a climax that left my mind completely blank.
“Augh!! Oh!! Ah…!! Nghhh…!! Ugh…”
This climax was strange; the pleasure coming from my nipples was even more intense than the one from my cock. I shuddered violently, feeling a sensation I had never experienced in my life, and sprayed my seed everywhere.
“Hehe, good job. Let’s kiss.” Yejin stroked my hair as if praising me, then grabbed my chin and forced a deep kiss. Even while kissing, she continued to rub circles around my nipples with a slow, deliberate touch.
“Hoo, hoo, hoo… ah…” Finally, as I slid my cock out of the onahole, white semen poured out from the round hole. While I was wallowing in the post-climax despair of having cum from my nipples, Yejin smiled brightly, showing the camera the hole dripping with my seed.
“Alright! That’s the fourth onahole test complete! My goodness, look how much that tight little hole has stretched out, can you see? It’s become a total loose hole… Now, finally, the grand finale! As you can see, this one is a tiny size that fits right in your hand, but it has an electric motor inside to vibrate and stimulate the glans. I’m curious, shall we try it out?”
Yejin placed the vibrating onahole on her thumb and pressed the remote. With a menacing whirrr, the device began to tremble on her thumb. Yejin looked at it with fascination. “Heh… this is more like a vibrator than an onahole, isn’t it? Interesting… Alright, let’s use it for its intended purpose, shall we?”
As Yejin turned toward me, I looked at the vibrating device with a tense, flinching expression. Yejin leaned over, carefully fitted the vibrating onahole onto the tip of my cock, then stood with her back to me, smiling. “There, I’ve put it on Bom-i’s cock! Can everyone see? Shall we turn it on? Let’s start with the highest setting… Eek?!”
At that moment, I couldn’t hold back; I grabbed Yejin from behind, squeezing her breasts with both hands. She froze, startled by my sudden outburst. I kneaded her bare breasts, rubbing her protruding, large areolas in circles, and whispered into her ear, “It’s your turn now, Han Yejin… this is revenge for earlier…”
“H-hey, w-wait… we didn’t talk about this… haa…” Yejin hunched over, shivering violently. While she was distracted, the remote was pressed, and the vibrating onahole wrapped around my glans began to buzzzz. My cock instantly stood at attention, poking into Yejin’s crotch.
“Ngh…! Oh… i-it’s intense…” As hundreds of tiny nubs focused their stimulation on my sensitive glans, I hung my head and let out a ragged breath. At the same time, I wedged my rigid cock between her labia. Yejin, feeling the vibrations through her panties, kept her knees pressed together, trembling uncontrollably.
“Ahhh…. haang… w-wait… haa… haa…”
Simultaneously, I squeezed and pulled on Yejin’s nipples to add to her pleasure. Unlike mine, hers were much larger and more elastic, making them easier to play with. I toyed with her sensitive nipples to my heart’s content while pressing and rubbing my cock against her crotch. Soon, Yejin’s panties were soaked, and my cock was slick with her juices.
“Haa… haat… ah… ah… a-ah… stop…”
Unlike the fake moans she had been making, Yejin let out a deep, heavy groan, twisting her body. I suddenly wanted to see her expression, so I pulled her chin with one hand to make her face me. ‘…Hah…’ Seeing her face contorted with pleasure, I was stunned, my breath catching in my throat. She looked so incredibly lewd, yet so beautiful. Yejin, perhaps embarrassed to show her face, quickly turned away and shouted, “D-don’t look…! Nghhh…!! Ahh…!!”
At that moment, Yejin clenched her crotch and climaxed, and I could vividly feel her labia twitching and spasming. “Augh!! Ahh!! Ngh…!! Hyaaat…!! Haa… haa… haa…!”
Of course, I reached my own climax at nearly the same time, my glans trembling as I sprayed my seed like a water gun in every direction. “Ugh…! Ahh…! Haa, haa, hng…!!” Even after the peak had passed, I kept pulling on Yejin’s nipples until they stretched nearly four inches, rubbing my cock against her labia to prolong the pleasure for as long as possible.