"Hmm, I knew it. Boys really do like this sort of thing, don't they? Alright, here we go~!!"
"Wow, it's so different from Issei's… even when I squeeze my tits together, the tip still pops right out, and from this close, the scent is so strong it's driving me crazy."
Sinking deep into the sofa, Rias knelt before Mitarai as if in supplication, then proceeded to envelop his cock between her magnificent breasts.
As she had said, even her immense 99-cm bust could not completely conceal his member; the glans remained exposed, peeking out from the valley of soft flesh.
The soft mammary flesh clinging to the shaft was, despite her exertion, cool and dewy to the touch, feeling immensely pleasurable.
The sheer abnormality of the situation—having the academy's revered Onee-sama, Rias Gremory, on her knees for him—fueled his excitement all the more.
Mitarai couldn't tear his eyes away from his own penis nestled in her cleavage, and he stared intently. Moreover, it now seemed as though a pink heart had appeared within the depths of her large, captivating blue eyes.
Her previously teased libido had exploded, and Rias was now thoroughly in heat. As a result, any man who saw her in this state would likely be tempted to drag her into a dark corner and have his way with her; she exuded that level of raw, sexual allure.
Any man who wouldn't swallow hard at the sight of such a seductive woman was either a homosexual or impotent.
Furthermore, whether consciously or subconsciously, she praised Mitarai by comparing him to her Issei. It seemed her relationship with Issei was quite lacking, for every time she gazed upon Mitarai's cock, she would let out a dreamy sigh and whisper her admiration, filling him with an indescribable sense of superiority.
"Senpai's breasts are amaaazing…"
"Fufu, you're drooling. It makes me happy to see you so pleased. Well then, I'll start moving…"
"Here we go, Squish Squishh~ It's so big, it's hard work moving my breasts like this, and it feels like your scent is going to stain them. Is it… marking, I wonder? Claiming these breasts as your own…"
"Mmm, the pre-cum and sweat make it slide so well. Nn-chu Nn-chu! It's making such lewd sounds. How is it? Does it feel good?"
"Y-Yes… If I let my guard down, I feel like I'll come right away."
"Mmm, that's fine. It's this big, after all. You probably won't be satisfied with just one release, so I'll play with you until you're fully satisfied. Oh my? …Well, never mind…"
"Somehow, sex itself became the goal, but that's okay. It's such a magnificent cock. Who knows when I'll get to taste it again?"
The thick, sealed valley between her breasts applied a constant, pushing pressure against his penis. The pleasure coursing through his brain was incomparable to his usual masturbation, like sparks of electricity crackling and flying before his eyes.
Yet, thanks to the slick mixture of sweat and pre-cum, his shaft slid smoothly up and down the silky channel. The sensation of parting the pliant, squeezing flesh with each thrust stoked Mitarai's excitement to a fever pitch.
With a "Nyurururuuu" sound, she lifted her breasts to envelop the glans completely, then slid them down to the base of his shaft with a wet "Bu-mm".
In this practiced, rhythmic motion, the tightly pressed mammary flesh clung to his cock like a suction cup, providing a soft, encompassing pressure that was entirely different from any sex toy.
As this series of motions was repeated in a steady rhythm—up and down, up and down—pleasured sighs repeatedly escaped Mitarai's lips.
They were the kind of sounds one makes when returning from the cold outside and sinking into a hot bath; sounds of complete and utter relief. Hearing these sounds of pure contentment from him only improved Rias's mood further.
One might think devils are creatures ruled by their desires, inherently self-centered. While this holds true for most, a minority are different. In another world, they might be called benevolent devils.
When it comes to their own kind, even among devils, they possess a nature to be indulgent and deeply caring. This trait, passed down through generations, is why the House of Gremory is known as the family of compassion.
Rias undoubtedly carried this blood within her. She was excessively sweet to the devils in her peerage, to those her family associated with, and their acquaintances.
So, what exactly was this feeling she was experiencing towards Mitarai, whom she had only just met today?
Was it merely a fleeting whim?
Was she simply driven by a maternal instinct? No, it was neither of those.
To put it bluntly, she was merely following her female instinct. As mentioned before, while not on the brink of extinction, the devil's race was facing a crisis.
Consequently, their consciousness was being gradually reshaped to prioritize procreation, and at this very moment, that switch had flipped within her.
She wanted to be impregnated by a boy with a superb cock. She wanted to be with this man. This wasn't about romance or affection; it was subjugation by instinct.
Rias, the daughter of the prestigious Gremory family, a devil of high standing, should, under normal circumstances, never be the one serving.
If Mitarai now wanted sex, she would fundamentally be passive, letting him do as he pleased.
If he said he wanted a titty-fuck, she would press her breasts together to form a valley and wait.
If he wanted sex, she would simply wait in positions like the missionary or doggy style, and he would take over on his own.
That was precisely why the service Rias was now performing for Mitarai was an exceedingly rare occurrence. Like any ordinary lover, she was sliding her breasts, stimulating his dick, and giving pleasure to the man.
Her firm breasts, with their soft, springy resilience, pressed tightly against the ridge of his coronal sulcus as if to fill the gap where his glans met the shaft.
They clung to him with almost no space left between them, transforming with every movement into a custom-made titty-fuck pussy just for Mitarai.
"U-um, Senpai, if it's okay with you, could you lick the head? The sliding feels good too, but my glans feels... itchy."
"Of course. Then, like this... Slurp Lick It's so salty. Even as I lick up your pre-cum, it just keeps overflowing~!! Your glans is swelling up so plumply; have you reached your limit? Nom Schlorp Slurp Slurp~!!!"
She didn't just lick; she took the glans into her mouth, lavishing it with her tongue inside the warm, wet cavity. The overflowing pre-cum filled her mouth, and if she didn't swallow, it would spill from her lips.
With a soft gulp, she swallowed, feeling a burning heat in her throat as if scalded. And this was just pre-cum—it was so viscous, clinging stubbornly to her throat. It was all she could do to mix it with saliva and force it down.
'If this is what the pre-cum is like, what would happen when the real thing, his semen, came out?' Just the thought of it made Rias feel her secret place growing wet.
Hidden by her skirt, it was fine for now, but the red panties she wore were already heavy, soaked through with her love juices.
They were drenched, and she felt they might slip down at any moment, exposing the sacred place they were meant to protect…
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