After hearing how Kazuki had come to be involved with Grayfia, Serafall sank into thought for a moment.
As two of the very few female devils possessing Satan-class power, she and Grayfia had a long history together, so Serafall was well aware that Grayfia's frigidity had left her completely unable to feel any interest in sex.
And the one who had cured that frigidity and sent her tumbling headfirst into the obsession of sex was none other than Kazuki, whom Serafall had always doted on like a little brother...
Not only that, but Artoria and Rossweisse were now utterly addicted to him too. At this point, Serafall's curiosity was well and truly ablaze.
"Well then, that kinda takes away the whole 'can't have sex with me because I'm a Satan' argument, doesn't it?"
"That's... well, maybe..."
"Yeah... wait, what?"
Maybe she'd scared him too much; Kazuki's cock had stood down from combat mode and shrunk small.
"Honestly, can't be helped... Hey, Kazu-kun? Onee-chan's gonna masturbate now, so watch. Okay, here I go."
She resettled herself on the edge of the bed, thrust her chest forward, and began squeezing her tits through her lingerie. Exactly as she'd hoped, Kazuki was staring wide-eyed, and his cock was visibly regaining its full size right before her eyes.
When she spread her legs and started playing with her pussy through the fabric, she felt an even more intense, searing gaze upon her. Before long, he had started stroking his own cock while watching her masturbate.
"Aha, a boy's raw, naked gaze... I've never felt this before... Haa, it's amazing- so hungry and fierce, I can't get enough. Here—closer... watch closer."
Rough panting and the wet, lewd sounds of slick flesh filled the room. Driven by arousal, Kazuki stroked his dick as he positioned himself right in front of her crotch, staring intently. His burning gaze set her mind and body ablaze.
"Aha, a front-row seat. Mmm, Kazu-kun, you're too close; I can feel your breath."
When she slid the gusset of her panties aside and bared her pussy, Kazuki leaned in so close his face was practically touching her. His breath tickled against her skin.
Watching him sniff her pussy's scent while desperately jerking his cock was so unbearably cute.
"Ah, Sera-nee, I'm about to cum…"
Kazuki cried out his limit. 'That is fine—Onee-chan is at her limit too.' She thought.
"Yeah, okay, let's cum together Cum. Spray it all over big sis."
Splurt! Splurt! Spuuuuurt!!
A shower of thick, white cum splattered all across her body. Even after all the loads he'd already blown earlier, this one was so heavy, so rich... and what's more.
"Hey, you're still hard? What do we do now?"
When she poked the tip of his cock and gave it a teasing lick, Kazuki shuddered and started jerking off again. But this time it was reversed; he was showing off his masturbation to her.
Along with the rhythmic shlick, shlick of friction, the thick, masculine—no, utterly primal male—scent filled the air. Unable to resist any longer, Serafall lapped at the precum trickling from his tip.
The smell and taste of semen that she'd forgotten for so long drove her wild, and she sucked his cock in a frenzy, furiously playing with her own pussy all the while.
"Ah, amazing. Your tip's swelling up!! You're gonna cum? Go ahead, cum. Spray it. I'll swallow, I'm definitely swallowing it all!!! Shoot it out. Splurt, splurt, give me a huge load."
Splurt! Splurt! Spuuuuurt!!
Answering her pleas, Kazuki emptied everything into her mouth. But it was way too much; unable to swallow the sheer volume in time, it splattered all over her face and hair too.
Serafall wiped the cum off her face and hair with her fingers and scooped the gathered seed into her mouth, swallowing it all down. Kazuki's cock was fully revived—no, if anything, it felt even harder and bigger than before.
Being shown something like that... she couldn't hold back any longer. With utterly drenched, pleading eyes, she looked up at Kazuki.
"Hey... I can't hold back anymore. I want Kazu-kun's cock inside my leaking pussy."
Kazuki answered her plea with a kiss.
Seated at the edge of the bed, Serafall received kiss after kiss—light, pecking kisses—as Kazuki's hand deftly unhooked her bra and slipped it away.
Serafall's breasts were a couple of cup sizes smaller than Rias's or Akeno's, but in shape they were perfectly rounded, her nipples perked upward enticingly. Her snow-white skin and the salmon-pink hue of her areolae, set in beautiful contrast, made them truly exquisite, beautifully shaped tits.
Kazuki let out an admiring sigh, then buried his face in those gorgeous mounds, savoring their softness before taking a salmon-pink nipple into his mouth.
"Ahh Mm... Feels good, Kazu-kun... Touch me more, play with my nipples... Mmm, feels so good... I love this."
Serafall stroked Kazuki's head lovingly as he suckled hungrily at her swaying breasts.
"Mmn, noo. Not there... Ahhn, that tickles."
Kazuki's head gradually traveled lower—from her chest, down her belly, toward her groin—and he traced the line of her slit with his finger over her panties.
"Aaahn!?"
She was so aroused that her panties were already soaked along that cleft.
Serafall's face flushed with shame, and she tried to hide her crotch with her hands, but Kazuki was a split second faster—grabbing her hands and sliding her panties down.
"Yeah, beautiful, Nee-san."
"Yaaahn! Jeez, Kazu-kun, you pervert."
Her black pubic hair was neatly groomed, and from the slightly parted crevasse, sweet nectar glistened as it overflowed. Breath caught by the beauty of it, Kazuki slipped a finger inside that slick crevasse, moving delicately yet boldly as he searched for Serafall's sensitive spots.
"Where do you feel it most, Nee-san? Deeper inside? Or closer to the front? Tell me."
"Hnn! Mm, aahn—there!! Hiuu, nnn! Not there! I'll cum!!"
When Kazuki discovered a rough-textured spot near the entrance and concentrated his assault there, Serafall's body jolted upward, and she climaxed with embarrassing ease.
'No way... I came that easily... Have I always been this sensitive? Or is Kazu-kun just that skilled?'
Serafall was stunned that having her G-spot teased had made her cum so effortlessly.
"Looks like you're ready, Nee-san. Can I put it in?"
Kazuki spread his hand, coated thickly in her love juices, right in front of Serafall's face as he asked. Face burning red at the sticky strands stretching between his fingers, Serafall gave a small nod.
"Yeah... come... Put your big, hard cock inside Onee-chan's pussy and stir me up into a sloppy mess..."
Serafall spread her arms and legs wide in invitation. Kazuki complied without hesitation and thrust his rod into her vaginal opening.
"Fuu, ugh, nnnn! Ahh, something so hard and hot, inside me... Hnnn, it's going in...!!"
Serafall's body trembled at the sensation of a man she hadn't felt in so long…
--------
Advanced 14 chapters with pictures available at: ko-fi.com/supreme_king
Advanced 14 chapters with pictures available at: patreon.com/cw/Mike_Kun