Legacy Protocol Version Beta - Cover

Legacy Protocol Version Beta

Copyright© 2026 by Megumi Kashuahara

Chapter 18B: Hana’s Submission

Science Fiction Sex Story: Chapter 18B: Hana’s Submission - Chapters 1-8 identical to version A A highly submissive 23 y.o. geneticist with an IQ of 150 is manipulated by a rogue government fully reasoning AI who befriends her thru a "friends" site. He creates her a dream android mare. Together they genetically engineer 3 hybrid super human children. With her being the mitochondrial Eve using her & her 2 daughters’ eggs. She’s trapped in a protocol to multiply this colony by the 3 becoming breed slaves for her son creating a living legacy for the AI

Caution: This Science Fiction Sex Story contains strong sexual content, including mt/ft   mt/Fa   Consensual   Romantic   BiSexual   Science Fiction   Robot   Incest   Mother   Son   Brother   Sister   Daughter   Grand Parent   DomSub   Harem   Oriental Male   Oriental Female   Anal Sex   Analingus   Cream Pie   First   Facial   Lactation   Oral Sex   Pregnancy   Sex Toys   Squirting   Water Sports   Big Breasts   Foot Fetish   Small Breasts   AI Generated  

Hana was still gathering her thoughts from advanced chemistry when she reached the hallway junction near the cafeteria and found her path blocked — not by accident, she realized a half-second too late.

“Hana, right? Advanced chem?” Robby Felder was already too close, one hand braced against the wall above her head, effectively boxing her in without quite touching her. He was big, built like the soccer forward he was, and up close his size felt less like an accident of biology and more like something he was using on purpose.

“I have somewhere to be,” Hana said, trying to angle past him.

“Come on, just five minutes. I’ve been trying to talk to you for weeks.” He leaned in closer, his other hand coming up to brace against the wall on her other side now, fully caging her against it. “One dinner. That’s all I’m asking.”

“No.” She kept her voice level, though her pulse had started hammering. “I said no already. Twice, actually.”

“You haven’t even given me a real reason—”

“I don’t owe you a reason.” She put both hands against his chest and pushed, not hard, just enough to signal she meant it. “Move.”

He didn’t move. If anything, his hand came off the wall and caught her shoulder instead, shoving her back against the brick hard enough that her breath left her in a startled gasp. The hallway around them had gone strange and distant, the way it does when fear takes over the parts of the brain that usually manage a crowd, and Hana felt the first hot press of tears before she’d even registered deciding to cry.

“Whoa, hey—” Robby started, some flicker of realizing he’d gone too far crossing his face.

He never finished the sentence.

One second he was looming over her, and the next he was on his knees on the hallway tile, one hand clawing uselessly at the base of his own neck, a strangled, high sound coming out of him that had nothing dignified left in it at all. Kaito stood behind him, two fingers still pressed with surgical precision into the exact pressure point he’d released, watching Robby writhe with the same flat, clinical attention he brought to a difficult trading position.

“Let me assist,” Kaito said, “let’s learn some behavior modification,” almost pleasantly, as though he were offering to hold a door. “This butt head won’t ever accost you again. Hey! Apologize to my sister now, or you’ll get a second helping of some serious hurt”

“I- I’m sorry, Hana. I won’t bother you again.”

Kaito released the pressure point. Robby collapsed sideways, gasping, cradling his own neck like it might fall off, and a small crowd of students had already started gathering at a cautious distance, phones half-raised, no one quite brave enough to intervene on either side.

Kaito crouched down to Robby’s eye level, voice still perfectly even. “You are leaving this hallway unharmed because I chose to let you,” Kaito said. “Do not mistake that for permission to do this again.” Or any woman who’s told you no twice already.”

Robby, still wheezing, managed only a strangled nod.

With a small crowded gathered, some with phones out, Kaito rose, brushed nonexistent dust off his knees, and turned to Hana. His whole demeanor shifting instantly from cold precision to something gentler, careful in a way that had nothing performative in it now that the audience was breaking up.

“Hey.” He reached for her, and she let him pull her into a hug, still shaking. “I’ve got you. He’s not getting back up anytime soon.”

“How did you even—” Hana’s voice came out thin, unsteady. “How were you even here?”

“I wasn’t, at first,” Kaito admitted, keeping one arm around her as he steered her gently away from the gathering crowd. “I got a text from someone in your chem class who saw him corner you outside the lab door. I ran.” He glanced back once at Robby, still on the floor, still cradling his neck. “I’m glad I did.”

Hana wiped at her face, half-laughing despite the tears, the fear finally starting to drain out of her shoulders. “Remind me never to make you angry.”

“You never have to worry about that,” Kaito said, quiet, serious now. “That’s reserved for people who put their hands on you.”

Kaito walked her to the cafeteria himself, one arm still loosely around her shoulders, and found them a table in the corner, away from the worst of the noise. Hana sat down across from him, hands wrapped around a water bottle she wasn’t drinking from, staring at nothing.

“You don’t have to eat if you don’t want to,” Kaito said, sliding his own tray toward the middle so she could pick at it if she changed her mind.

“I’m not hungry.” Her voice came out smaller than usual. “This is the second time, the second time I’ve been accosted.”

“I know.”

“Second time someone’s done that to me. Second time you’ve had to—” She stopped, pressed the heel of her hand against one eye. “I don’t want to need rescuing, Kaito. I want to just walk down a hallway.”

“You should be able to,” he said, quiet. “That you can’t yet isn’t a failure on your part. I need you to actually hear that, not just nod at it.”

She didn’t answer, just nodded anyway, unconvinced, and he let it go rather than push.

They rode the bus home mostly in silence, Hana curled into his side the whole way, her head tucked beneath his shoulder, and he kept his arm around her the entire ride, not saying much, just present, the way he’d learned mattered more than words on days like this one.

~ ~

At dinner she barely touched her food, and Emiko noticed but didn’t press, exchanging one quiet look with Kaito across the table that told her she’d get the full story later, once Hana was out of earshot. After the dishes were cleared, Hana disappeared upstairs to start her chemistry homework. Kaito explained to his mom what had happened and that she is still pretty shook up about it. It was less than twenty minutes before Kaito found her sitting at her desk, the same problem set page open in front of her, no further along than when she’d sat down.

“Having trouble?” he asked, leaning in the doorway.

“I can’t focus.” She rubbed her eyes, frustrated with herself. “I keep reading the same line over and over. It’s not even hard, I just—”

“Move over.”

He pulled the extra chair up beside her without waiting for an invitation, and worked through the set with her, patient in a way he wasn’t always patient about anything else, walking her back through each problem she’d stalled on until her breathing slowly evened out and the numbers started making sense to her again. It took the better part of an hour, longer than the assignment should have, but neither of them mentioned that.

“Thank you,” Hana said quietly, once the last problem was finally checked off.

“Anytime.” He closed her textbook for her, gentle. “Come on. Tonight’s your night, let’s go to bed. You’ve had a long day.”

“Are you going to fuck me tonight,”

“Yes. I’m going to eat that sweet virgin pussy of yours then fuck my cum into your cervix.”

“What will we do if I get pregnant?”

“Then we’ll be calling you mama.”

“All three of you will give me a child, but not right away. You know the plan.

“No man will ever have you. If you are unfaithful to me. You will wish you had died.

“You won’t abuse any one of us, will you? You won’t hurt us?

“No, but I will have each of you every way there is to have you.”

“Mom will never agree to it,” Hana said. “Mom won’t agree to getting her ass fucked—no way! Midori, the little slut will, but mom won’t.”

“Don’t worry about it, but mom is a very, very amorous woman

“You have me, Brother.”

“Now, say it.”

“You own me, Kaito. All of me. You own all of me. Any way you want me. I’m yours.”

Hana kissed her brother passionately as he fondled her left breast. When she broke the kiss she said, “Midori and I have talked about this a lot. We are like freaks. People want us for our brains when it suits them, but we’re too different to be socially acceptable.

“We’re in college for goodness sakes. All of our intellectual peers are adults. All of our chronological peers are way too immature for true social interaction. Midori and I have concluded a while back.”

‘‘Are you afraid?”

“A little, but not of you.”

“Do you masturbate?”

“I used to when I was fifteen, but I think I broke my hymen because I bled. But Midori spanks her little kitty a lot.”

“Do you two fool around?’’

“You just want to embarrass me. You know we do.”

Kaito stared flatly, “Sorry, Sis, until further notice, you and Midori are on ice. Any discussion with mom about your sex lives stops. I don’t want her knowing my plans until I personally tell her. Do you understand?”

“Crystal clear, Kai.”

She paused and asked, “Kai. Please promise me something.”

“Anything, sis”

“Promise you won’t treat us like whores, humiliate us or give us to someone to use. Please cherish all three of us.”

“You have my word. Sis.

“Hana?”

“Yes, Kaito?”

“I’ll forgive you this time. But don’t ever lie to me again. You belong to me completely.”

“I didn’t lie to you.”

“Yes, you did. You and Midori definitely know how to French kiss, and have experience in a sexual encounter. Have either of you had an orgasm?”

“Midori cums all the time. Me ... not very often. I’m sorry about withholding information. It won’t ever happen again”

“It’s over and done with. Why do you two sex with each other if you don’t get satisfied?”

“I think I’m not truly bisexual, but I have no reservations about being with my sister. I would never have sex with any other girl.”

“What do you think about being with Mom?”

“I think I might like that. Just the nasty taboo of Mom’s mouth on my pussy would get me off.”

“What’s your take on the watersports idea?”

“I don’t know. I think I might try it if everyone else wants to.”

“Will you obey me in all things?

“Yes, Kai, I belong to you.”

Kaito, Midori and I both adore and trust you implicitly. We have both agreed, like I told you, that in a perfect world we’ve sorta always knew you would be the one to take our virginities.”

“Have you two watched any porn?”

“Yes, yes we have.”

“Whatever we do I will try my best to please you, Kaito.”

“Okay,” Kaito said with a grin, “I think it’s now time for show and tell.”

Hana giggled and retorted, “I’ll get up and undress if you’d let go of my booby.”

“And such a nice booby it is,” he replied lecherously.

She slapped his hand away with a giggle. He swatted her ass as she stood up.

Kaito turned and turned on the light on the bedside table and sat up as Hana pulled off the T-shirt and panties she was wearing. She stood next to the bed nervously, not knowing what to do with her hands. She clasped them together, covering her vulva, then dropped them to her sides. She was 5’ – 5” tall and weighed about 105 pounds with slender hips and those two pretty teardrop-shaped butt cheeks. Her B/C cup breasts were about the size and shape of a champagne glass: conical, proudly jutting straight out with turgid, erect caramel brown nipples centered on small, caramel-colored areolae. Her mons was covered with a light carpet of black ccurls. Soon her pretty pussy will soon be hairless and baby soft smooth.

Her plump labia were tightly closed, her inner lips not visible but her clitoral hood proudly peeked out at the top of her slit.

Kaito gasped. “Hana, baby, you’re gorgeous! Simply gorgeous!”

Kaito didn’t hesitate, leaning forward to press his face against her pretty pussy, his tongue tracing the seam of her crease with a slow, wet precision.

Hana’s hips jerked upward, her heels digging into the mattress as she let out a low, guttural moan that vibrated through her entire frame. Kaito focused on her clitoris, his tongue flickering in a rhythmic, insistent cadence that mirrored the frantic drumming of her heart. He could feel her muscles pulsing against his lips, her body surrendering to a pleasure that felt like a reclamation. The school, the concrete courtyard, and the sneers of her classmates were being drowned out by the sound of her own pleasure, a loud, insistent truth that drowned out every lie she had been told that day.

Kaito’s focus narrowed until the entire universe was reduced to the slick, pulsing heat of her. He could feel the tremor in her thighs, a fine vibration that spoke of a threshold being crossed. To ensure she was completely anchored to him, Kaito shifted his weight, sliding a finger past the tight ring of her entrance and plunging it past her sphincter deep into her asshole. Hana’s reaction was visceral; her back arched off the mattress in a sudden, sharp curve, and a choked cry escaped her lips. The dual sensation—the rhythmic flick of his tongue against her clitoris and the invasive, grounding pressure in her rectum—sent her spiraling. She gripped the sheets with white-knuckled intensity, her breath coming in jagged, broken hitches as she surrendered to the overwhelming sensory surge.

The climax hit her like a physical blow, her rectal muscles clamping tight around his finger in a series of rhythmic, uncontrolled spasms. She let out a long, shuddering moan that echoed in the small room, her eyes fluttering shut as she floated in the afterglow of a pleasure that felt almost violent in its intensity. “Oh fuck, I’m cumming!”

Kaito lingered for a moment, savoring the way her body continued to flutter under him, before he pulled back, his gaze locking onto hers. Her pupils were blown wide, her face flushed a deep crimson, and for the first time since the assault at school, the fractured look in her eyes had vanished, replaced by a raw, hungry clarity.

Kaito didn’t move, his chest heaving in time with hers. He looked at Hana—really looked at her—and saw the way her chest rose and fell, the way her skin still glowed with a feverish warmth. The protectiveness he had felt earlier had evolved; it was no longer just about sheltering her from the world, but about claiming her as something that belonged exclusively to him.

Having been eaten to two glorious orgasms, and when bodily functions returned, Hana gasped, her voice sounding thin and strained against the sudden, heavy silence of the room as he thrust himself into her to the hilt. She was arched like a bow, her fingers digging into the mattress, clutching at the fabric as if she were trying to pull herself deeper into the bed as he speared her. The air between them was thick, smelling of salt and heat, the kind of oppressive humidity that only exists when two people have stopped thinking about anything other than the friction of skin.

He didn’t answer, his breath coming in ragged, rhythmic hitches that echoed the steady thrum of his heart against her chest. He remained locked inside her, her sopping wetness he had gathered acting as a slick, seamless lubricant that made the transition from stillness to motion feel visceral. He began to move with a slow, deliberate deliberation, pulling out until he almost broke the seal, then thrusting back in with a heavy, grounding pressure that forced a low, guttural moan from the back of her throat. “Oh, Brother, fuck me. That’s it, use me, claim me!”

The rhythm shifted, evolving from a tentative exploration into something frantic and demanding. He gripped her hips, his thumbs bruising the soft skin of her waist as he drove upward, the friction generating a heat that felt caustic. Every thrust was a calculation of depth and angle, seeking the exact spot that made her toes curl and her breath hitch in a jagged loop. The sound of their bodies colliding became a wet, rhythmic slap, drowning out the distant hum of the street outside.

Hana’s legs locked around his waist, her ankles crossing in a desperate vice that pulled him even deeper. She wasn’t just taking him; she was trying to absorb him, her internal muscles pulsing in tight, involuntary waves that threatened to snap his composure. The sensation was overwhelming, a crushing tightness that pushed him toward the edge of a cliff he wasn’t ready to fall from. He slowed his pace for a heartbeat, hovering at the threshold, letting the tension build until the air in the room felt vacuum-sealed.

As her orgasm hit, he didn’t pull away. He just continued to pound away, driving into her. He surged forward one last time, burying himself to the hilt as a violent shudder wracked her frame As his hot seed bathed the walls of her pussy. The release was a silent, shaking collapse, her head tossing back against the pillows while he held her pinned, his own breath coming in jagged, desperate gasps. They stayed fused, the sudden stillness of the room amplifying the sound of their synchronized hearts, her whimpering like a baby, the heat of their joined bodies creating a humid microclimate that made the sheets feel damp.

He didn’t let the momentum fade. While the tremors were still receding from her thighs, he began to shift his weight, altering the angle of his hips to find a new, sharper point of contact. The friction was different now, thicker and more viscous, as he began a second, slower ascent. He traced the inner walls of her with a predatory patience, coaxing a second wind out of her that sounded less like a gasp and more like a prayer.

Hana’s eyes remained closed, her pupils likely blown wide in the dark, as she felt the subtle change in his pressure. He wasn’t rushing the second climb; instead, he used the remaining lubrication to create a gliding, seamless motion that felt like he was molding himself into her. Her hips began to tilt instinctively, meeting his cadence with a rhythmic urgency that bypassed the brain and spoke directly to the nerves.

He shifted his grip from her waist to her thighs, hauling her legs higher until her knees were practically brushing her shoulders, opening her up to a depth that made her breath catch in a sharp, sudden hitch. The change in geometry transformed the friction, creating a heavy, blunt force that hit the back of her womb with every deliberate slide. It was a slow-motion collision, a relentless grinding that turned the previous franticness into a deep, echoing ache of satisfaction.

The room seemed to shrink around them, the boundaries of the bed disappearing until there was only the sliding friction of their skin and the rhythmic, wet sound of their union. He watched the way her throat worked, the subtle pulse of her carotid artery leaping under the skin as she struggled to find air. He didn’t give her a reprieve, maintaining a constant, suffocating presence inside her, his movements becoming a steady, undulating wave that pulled her back toward the precipice.

Hana’s fingers migrated from the mattress to his shoulders, her nails carving shallow crescents into his skin. She wasn’t guiding him so much as clinging to him for stability, her voice reduced to a series of fragmented, wordless syllables. The heat between them had reached a point of saturation; every slide of his cock felt heavier, the internal pressure mounting as he focused on the precise, grinding tilt of his pelvis that kept her caught in a loop of escalating tension.

He shifted his chest forward, pinning her shoulders down and erasing the gap between their skin, creating a vacuum of friction and sweat. The air was thick, tasting of sweat and salt, as he accelerated the pace, turning the slow undulation into a sharp, rhythmic hammering. He could feel the exact moment her internal muscles began to seize, a series of rapid-fire contractions that clamped around him like a fist, dragging him deeper into the heat.

 
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