Using a Mysterious Spellbook Ended Up Creating a Slave Harem - Chapter 30

 A Best Friend Sandwich with Erika and Iroha - Part 3

Having pierced Erika with the dildo, Iroha shifts into a position that makes it incredibly easy for me to insert myself. Captivated by the beautiful yet intoxicating spectacle enacted by these two gorgeous girls, my cock is completely primed and ready for action.

Grasping my penis, which is arching backward so aggressively it looks ready to slap against my lower abdomen, I slide it right into Iroha’s pussy from behind in the doggystyle position. Her passage is notably tighter than Erika’s, and I let out an appreciative groan at the distinctly different sensation of her vaginal walls.

"Ngh, aaah…… Iroha, this tightness of yours is absolutely unreal……" 

"Ah…… ♪ Master's hot, hard rod is sliding all the way inside me ♪" 

"Please move ♪ M—Master~ ♪ Iroha ♪ Move inside her~! Move!"

Responding to the desperate pleas of an Erika who can no longer contain herself, Iroha begins pumping her hips. Deciding to use this as a brief breather, I keep my own lower body still and leave the driving entirely up to her.

Every time Iroha pulls back to retreat from Erika’s depths, she ends up slamming the deepest part of her own core right against my flesh rod. In her frantic effort to punish Erika, she finds herself completely at the mercy of my own counter-punishment.

"Iroha~! More! Give me more!" 

"M—Master~ ♪ Please, Master, you have to move too ♪" 

"Fair enough. Recess is officially over."

Matching the fluid rhythm of Iroha's hips, I begin hammering my waist forward as well. Though I have enjoyed the interior of her vagina countless times over the past six months, just like with Erika, the sheer pleasure I am experiencing right now feels entirely unprecedented.

I furiously plunge deep into a tight canal that perfectly matches her petite frame, fighting through the thick, desperate suction of her mucous membranes. All the while, she lets out a barrage of high-pitched, breathless shrieks as she shoves the dildo back and forth inside Erika.

"Aaah…… this feels incredible." 

"Ngh, auu~ ♪ Yaahn!" 

"Ah…… m—more, harder…… hit me harder~ ♪"

I repeatedly pound through a passage that clamps around me tightly enough to verge on painful. Driving my hips forward until our bodies collide at the absolute limit, I continue to scoop out her narrow interior, making her cervix and urethra practically kiss with every deep stroke.

"Ahn~! ♪ Master, yours feels so spectacular~ ♪" 

"It's so good! Hngh! ♪ I'm being totally ravished by Iroha~! ♪" 

"Ohhh! The inside of your pussy feels even sweeter than usual, Iroha!"

The three of us violently grind our hips together in a synchronized frenzy, generating an endless feedback loop of ecstasy. The room echoes with the wet, rhythmic slapping of colliding flesh as we charge in a straight line toward the absolute peak.

Grasping the slender waist of a thoroughly sweat-drenched Iroha, I pump my hips with desperate intensity. Our mingling groins become hopelessly smeared in a cocktail of slick juices, generating an incredibly lewd, splashing squelch.

"Hii! No! I—I feel like I'm about to cum again! ♪" 

"M—Me too, I'm…… already…… Iroha~ ♪" 

"I—I'm right at my limit too……"

Drenched in a thick sheen of sweat, all three of our bodies violently slam together. Unable to support her own weight any longer, Iroha collapses entirely onto Erika, the two women wrapping their arms around each other in a tight embrace.

"Aahn ♪ M—Master~ ♪ I'm going to cum! I'm cumming ♪" 

"Nooo~ ♪ I'm going! I'm going to go too~ ♪" 

"I—I'm about to blow…… I'm letting it out!" 

"I—I'm cumming!! Aaah!! ♡ Ohhh!!! ♡" "Hiiieee! No!! No!! Iiiii!!! ♡" 

"I'm cumming! ……It's coming! Uuugh……"

Driven by the sheer depth of their bond, Iroha and Erika reach the heavens of pleasure at the exact same moment. Trapped within Iroha’s crushing, hyper-constricting canal, I unleash what is her very first round of the day, but my absolute third consecutive eruption.

Pulling her hips flush against mine to ensure our groins are tightly sealed, I pump my semen deep into her uterus. As the pulsing walls of an undulating, newly climaxed Iroha twist and squeeze my shaft, my penis throbs repeatedly until I have drained every last drop inside her.

"Aaah…… Master…… ♪" 

"Nnn~, ugh, aaah…… I'm so…… so happy…… ♪"

Basking in the paralyzing afterglow of their mutual climaxes, the two women remain tightly locked in each other's arms. Having released three times now, I slowly slide my understandably shrunken cock out from Iroha’s depths.

"Haa…… haa…… as expected, bursting out three consecutive rounds is pretty exhausting."

Breathing heavily, I sit back on the mattress and gaze down at their overlapping, fluid-smeared groins. Suddenly, a completely limp Iroha lets out a panicked, frantic gasp.

"M—My stomach feels so hot……" 

"……What's wrong, Iroha?" 

"It's hot…… My stomach, it feels like it's burning hot!"

Startled by her sudden outburst, I spring to my feet and pull her body away from Erika. Rolling Iroha onto her back, I inspect her lower abdomen—only to find her crest radiating a brilliant, intense light unlike anything I have ever witnessed before.

"What the……" 

"……Ngh, ……I—Iroha?" 

"It's burning! Aaah!! K—Kyaaa!!!"

As I stand completely frozen by the unexpected turn of events, Iroha lets out a piercing shriek. The crest’s luminescence intensifies to such a degree that it becomes impossible to look at directly. Unable to bear it, I squeeze my eyes shut and avert my face to escape the blinding glare.

"……What on earth is happening……?" 

"Iroha? Are you okay!?" 

"…………, …………Ah."

After a short while, I cautiously crack my eyelids open to find the blinding light has completely vanished. As a worried Erika rushes over to Iroha’s side, my eyes lock onto the crest. The vivid coloration is entirely gone, replaced by a stark, pristine white outline.

I don’t recall any mention of a phenomenon like this in the magical grimoires, I think to myself. Right then, something smoothly pops out from her vaginal opening with a distinct, wet sliding sensation.

"…………Ugh, ……haa, ……Erika-chan?" 

"A—Are you alright!?" 

"Iroha, how does your body feel?" 

"……Yeah, it—it doesn't feel hot anymore. I think I'm okay." 

"Thank goodness……" 

"I—I see."

Watching her slowly push her upper body up to inspect her stomach, it appears Iroha is genuinely unharmed. With that out of the way, I direct my undivided attention toward the object that just emerged from her depths.

It is a spherical object, roughly three centimeters in diameter, gleaming with a greenish-gold tint. Coated in a layer of Iroha's love juices, I cautiously poke it with the tip of my finger—only to instantly sense an incredible phenomenon.

"This thing…… it’s brimming with an immense amount of magical energy." 

"……Magical energy?" 

"W—What is that?" 

"It just came right out of your body." 

"Eh……?" 

"It's true. It popped right out of your pussy."

Testing it out, I pinch the object between my thumb and forefinger. The sheer volume of compressed magical energy sealed inside is staggering. Grabbing a tissue, I thoroughly wipe away the clinging fluids and bring it close to my face to examine it further.

"It feels like pure, highly compressed mana." 

"Haa……" 

"Do you think it has something to do with why my crest turned white?" 

"Most likely…… Well, I'll keep it as a research subject for later."

Realistically speaking, there's no way to determine exactly what this is right now. Still, I have a strong hunch that if I can figure out how to properly harness the dense magic contained within this sphere, things are going to get very interesting.

"Well then, I’ve only put out three rounds so far. Erika, you're up next. Come here." 

"Y—Yes."

Reseating myself on the mattress, I call Erika over. She pushes herself up and approaches me obediently. Reaching out both of her hands toward my currently flaccid penis, she begins to slowly, gently stroke it.

"Master?" 

"……What is it?" 

"Would it be alright if I squeezed your penis between my breasts?" 

"……A titjob!? I would absolutely love that." 

"Then please allow me to serve you with these breasts of mine." 

"Yeah…… wait, this posture isn't going to work."

Standing up, I step out of the sex room to scavenge for something useful. Down the hall, in the room disguised to look like Iroha’s actual bedroom, I spot a height-adjustable office chair.

Wheeling it back into the room, I adjust the height so it aligns perfectly with Erika, who is currently kneeling on the mattress.

"Alright, preparations are complete. Take it away, Erika." 

"Yes ♪"

Sitting shallowly on the edge of the chair with my legs spread wide, I welcome Erika in. With my penis already thoroughly lubricated by the abundant juices of both women, she easily slides the shaft right into the deep cleavage of her ample breasts.

"Here I go ♪"

Slowly shifting her heavy breasts with both hands, she begins rubbing them up and down my shaft. Waves of intense pleasure instantly ripple through my cock as it finds itself tightly compressed by her massive cleavage, and it regains its full, rock-hard vigor in no time flat.

"Mm, this…… this feels incredible too." 

"How do you like it? This is a special service that Iroha could never pull off, you know? ♪" 

"Erika-chan, that's so mean!"

While I’ve experienced this before with Chihiro, receiving a titjob from someone with breasts this massive is an absolute delight. Being thoroughly squeezed and massaged by such soft, heavy mounds provides a completely different flavor of pleasure compared to actual penetration.

"Ah ♪ I'm going to lick the tip too…… slurp" 

"……Ohhh! K—Keep going……" 

"Yes ♪ chu, lero, pero"

Seeing my erection surge even further as the glans peeks out from the top of her cleavage, Erika extends her tongue and begins licking it. The moment the tip of her tongue teases the slit of my head, a fresh wave of pre-cum spills right out.

"Lero…… Master is looking so happy ♪" 

"Aaah…… stroke it more."

Simultaneously tightening the pressure of her breasts, she friction-fucks my cock over and over within that narrow valley. Being jerked off like this while she smiles up at me with such a sweet, adoration-filled expression sends my arousal through the roof.

"Master ♪ Do my tits feel good? ♪" 

"They're amazing. If I lose my focus for even a second…… I’m going to blow." 

"Please make sure to tell me right before you go. I want to catch it all in my mouth."

Hearing those words, my absolute limit rushes over me all at once. Deciding not to force myself to hold back this time, I resolve to let it fly the exact moment I feel the urge.

"I—I'm about to go……" 

"Understood…… chu, pak"

At my warning, Erika presses a firm kiss against the tip of my cock before sealing her lips completely around the glans. Shoving the pointed tip of her tongue directly against the slit, she pushes me right over the edge.

"S—Stop, that's too intense…… it's coming……" "

Ngh…… lero, lero" 

"I—I'm cumming! It's shooting!! Erika!!"

Gripping the backrest of the chair, I arch my back slightly and ejaculate directly down her throat. Erika takes the barrage of semen straight into her mouth while using her massive breasts to milk the shaft upward, maintaining a powerful suction on the tip.

Her throat clicks rhythmically as she gulps down my warm seed. She sucks out the remaining semen trapped within my urethra, swallowing every single drop into her stomach.

"Ngh…… ……Ah! Haa……" 

"Ngh, goku…… churu……" 

"Master. Did it feel good?" 

"Ugh…… Iroha, you're really going to ask that now?"

Seemingly struck by a bout of jealousy, Iroha throws a rather difficult question my way. Dealing with two women at the exact same time certainly comes with its own unique set of complications.

Even after swallowing every last drop of my semen, Erika refuses to let her mouth leave my glans. For the record, I have already confirmed that her crest reacts whether I come inside her, have her swallow, or facial her.

However, based on my testing with Iroha, the intensity of the crest’s darkening follows a strict hierarchy: internal ejaculation > swallowing > facial. Depending on what my future research yields regarding this "magic sphere" Iroha just produced, prioritizing internal ejaculation might become an absolute necessity.

"Ngh…… chu, churu, ahn~ ♪" 

"E—Erika!?"

While these thoughts drift through my mind, Erika releases my penis from her breasts and pulls the entire length deep into her mouth. Just like that, she smoothly transitions into a thorough clean-up blowjob.

"Ohhh…… it feels like it’s about to get hard all over again……" 

"Jyuru, lero…… chu" 

"Erika-chan, that's cheating…… I want to serve Master too……" 

"Erika takes priority today, so be patient." 

"Okay……"

While being deeply fellated by Erika, I make sure to pay attention to a clinging Iroha as well. Still, since I have no idea when our next secret rendezvous will be, Erika gets absolute priority today.

As I alternate between sucking on Iroha's nipples and planting kisses on her lips, my cock achieves a state of full, absolute resurrection inside Erika's mouth. Popping it out from her lips, she kisses the tip a few times before looking up at me with a radiant smile.

"Master ♪ It's completely energized again ♪" 

"So it is. In that case, let me give you your reward."

Pushing myself up from the chair, I press a kneeling Erika down onto the mattress. Guiding her long legs to spread wide open, I slide smoothly inside her, locking our bodies together in the missionary position.

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