Becoming Master - Cover

Becoming Master

Copyright© 2026 by Megumi Kashuahara

Chapter 1

BDSM Sex Story: Chapter 1 - When Kiko confesses she's been in love with her stepsister Rin for six years, everything changes. The kiss that follows sends Rin spiraling—not with horror, but with recognition. As Rin reexamines every moment of their shared history, she begins to understand that what she'd called sisterly love might be something else entirely. Now they must navigate their feelings while living under one roof, knowing their parents may have suspected all along. A tender exploration of first love, identity, a

Caution: This BDSM Sex Story contains strong sexual content, including Ma/Fa   Ma/ft   Fa/ft   Romantic   Slavery   Lesbian   BiSexual   School   Incest   Mother   Son   Brother   Sister   Daughter   BDSM   DomSub   MaleDom   FemaleDom   Polygamy/Polyamory   Interracial   Black Female   White Female   Oriental Male   Oriental Female   Anal Sex   Analingus   Cream Pie   Facial   Lactation   Masturbation   Oral Sex   Petting   Pregnancy   Sex Toys   Squirting   Water Sports   Big Breasts   Small Breasts   AI Generated  

The rolled-up college diploma on the passenger seat of Kenzo’s sedan felt like a dead weight. For four years, he had tried to outrun the shadow of the Yakamura estate, attempting to become a man of “reason” and “choice.” But as he turned onto the interlocking pavered driveway, he felt his own spine stiffen and his face harden into a mask he hadn’t worn since high school. The mirror was returning to its frame.

The house sat at the end of the lane, a multi-million dollar two-story estate colonial that still looked, from a distance, like the pride of the neighborhood. Tanaka Yakamura had been a man of iron-willed perfectionism, and the house he built was sturdy. But as Kenzo got closer, the small signs of neglect appeared: the lawn, usually meticulously manicured to a uniform two inches, was shaggy and uneven. Weed tendrils were beginning to choke the flowerbeds.

Kenzo pushed the front door open. The house was structurally sound, but the air inside was stagnant. The stench of rotting, spoiled food, overflowing trash, and unwashed bodies hit him like a physical wall. It was the paralysis of the living, not the decay of the building, that choked him.

In the kitchen, the high-end granite countertops were buried under a mountain of crusty cereal bowls and sticky takeout containers. He first found Mioki, the fourteen-year-old baby of the family wearing a pajama T-shirt, Miss Kitty panties and mismatched socks. In front of her was a single bowl of rice that had long since gone cold and sticky. She was staring at a spot on the granite counter about three inches from her hand.

“Mioki,” Kenzo said.

She didn’t flinch. She didn’t look up. Her breathing was shallow.

“The milk smelled funny,” she whispered, her voice sounding like it was coming from the bottom of a well. “I didn’t know if I should use it or go to the store. I didn’t have a list. So I just ... waited.”

Kenzo looked at the sink behind her. It was a stagnant pool of oily water and submerged silverware. He felt a surge of that familiar, cold rage—the Vigilant Burden-Bearer seeing the “Standard” trampled. He didn’t comfort her. He couldn’t. To him, her paralysis was a breach of the Law.

“The blue bowl was dirty,” she whispered when Kenzo asked why she wasn’t in school. “I didn’t know if I should wash it or use the red one. Father said red was for soup.”

She had gone numb. Faced with a choice between two ceramic bowls, her brain had simply shut down to avoid the “danger” of a wrong decision. Kenzo felt a sickening wave of familiar shame. He remembered being six years old, standing frozen in front of his closet, unable to move until Tanaka’s belt clicked against its buckle. He knew Mioki wasn’t “lazy”—she was stalled.

The house was too still. It was the kind of silence that usually preceded a funeral, yet the body had been in the ground for two months.

He followed the silence upstairs. When he crested the stairs, he nearly collided with Hikari in the hallway. The middle sister, sixteen-years-old, was sitting cross-legged on the floor, surrounded by hundreds of biology flashcards. She wasn’t reading them. She was using a plastic ruler and a fine-point pen to trace over the letters of words she had already written.

“Hikari? What are you doing? You’re missing school.”

She didn’t look up. Her pen hand was shaking so hard the nib was clicking against the card. “The margins, Kenzo. They have to be exactly half an inch. If they aren’t even, the teacher will think I’m sloppy. If I’m sloppy, I’ll fail. I’ve been trying to get this one card right since breakfast. I just need to ... I just need to get it perfect.”

She had traced the word Cell so many times the ink had bled through to the floorboard beneath. She was vibrating with a frantic, useless energy, trapped in a loop of terrifying precision.

Stepping past the mess on the floor, Kenzo pushed open the double doors to his parents’ room. The air was thick and smelled of unwashed bedding and old tea. In the middle of the massive king-sized bed, there was a heavy, motionless mound under the duvets.

“Mother?”

The covers shifted slightly. Midori peered out, her face pale and her eyes darting around the room as if looking for an exit that wasn’t there.

“Kenzo? Is it time for dinner?” she whispered.

“It’s noon, Mother. Why are you in bed? The mail is piling up on the porch. There’s a notice from the electric company.”

She pulled the duvet tighter around her neck, her knuckles white. “I went to the kitchen, Kenzo. I really did. I wanted to make tea. But I stood in front of the cupboard for an hour because I couldn’t remember if your father liked the green tin or the black tin on Tuesdays. I just ... I couldn’t pick one. If I picked the wrong one, the whole day would be ruined. So I came back here. It’s safer in the dark.”

Kenzo looked at her and felt a sickening drop in his stomach. She wasn’t sick; she was stuck.

Seeing my mother, now the supposed head of the house, buried under covers as if she was dead and buried herself really pissed him off! He yanked the heavy comforter from the bed to reveal her nude body. “Get your ass outta that bed and put some clothes on, then get downstairs. NOW!”

Storming out of his mother’s bedroom. He headed down the hall to Kioko’s bedroom. Kioko, the oldest of the girls at seventeen, was lying in bed, sprawled out on her bed in a sheer thong and a black demi-bra with her legs splayed wide open, the room a chaotic mess of laundry and assorted garbage. She was the only one moving, aggressively painting her fingernails a bright, crimson red.

“Oh, look,” she sneered, though her eyes were glassy. “The savior returns. You going to tell us what to do, Kenzo? You going to pick out our socks? Because these three have turned into dead, brainless twits.”

“And you?” Kenzo asked, gesturing to the mess. “You’re just going to lay here in this filth?”

“I’m not doing a fucking thing until someone makes me,” she snapped, her voice cracking. “I don’t care. Let the lights go out. Let the house rot. I’m staying right here.”

She was leaning into the chaos as a weapon, but as Kenzo looked at her trembling hands, he realized she was just as paralyzed as the rest of them—she was just using noise to hide it.

“Whether you like it or not, I’m the new boss. You’ve got five minutes to get outta that bed and down to the kitchen. Or there’s gonna be hell to pay.”

~ ~

The visual contrast in the kitchen was a map of the family’s ruin. Midori sat hunched at the head of the table, clutching her cardigan closed as if she were freezing in the mid-day sun. Mioki was a ghost, perched on the edge of her chair, while Hikari stood by the counter, her fingers still twitching in the rhythm of tracing margins.

Then there was Kioko.

She leaned against the doorframe, her skin pale and goose-fleshed, wearing nothing but a sheer thong that clearly showed her shaved pudenda and a sheer demi-bra. It wasn’t an act of seduction; it was an act of war. She was weaponizing her modesty—or the lack of it—to see if Kenzo would break. She was daring him to be the “Master” and tell her to cover up—or maybe more; just so she could have something to scream at.

Kenzo didn’t look away, and he didn’t blush. He looked at her with a cold, dead-eyed exhaustion that seemed to unnerve her more than a lecture would have.

“Put a robe on, Kioko,” Kenzo said, his voice dangerously level. “You’re not a rebel. You’re just cold and desperate for attention.”

“Make me,” she hissed, her chin trembling. “Tell me exactly which robe. Tell me which knot to tie. Or maybe you can just hit me like Dad used to when I didn’t maintain ‘the Standard.’”

The mention of the belt hung in the air like a thick fog. Midori flinched, burying her face in her hands. “She wants it, Kenzo.”

“Nobody is hitting anyone ... yet.” Kenzo said, though the lie felt heavy in his mouth. He looked at the four of them—the women who were supposed to be the heart of his life. “I just spent twenty minutes walking through this house. It’s not just a mess. It’s a bombed out grave. Mother, you’re hiding in the dark. Hikari, you’re rubbing paper until it tears. Mioki, you’re starving because of a ‘Best By’ date.”

“We don’t know what to do, Kenzo,” Midori sobbed into her palms. “He didn’t leave a list. There’s no schedule on the fridge. We don’t know what he wants.”

“He’s dead, Mother!” Kenzo slammed his hand onto the granite counter. The crack of palm against stone made Mioki jump. “He’s in the ground. He doesn’t want anything. The electric company wants their money. And the school wants to know why three girls have vanished from the face of the earth.”

He looked at Kioko, who was still standing there in her underwear, her defiance starting to wilt under the sheer weight of his anger.

“This is how it’s going to go,” Kenzo continued. “Since none of you can seem to decide whether to breathe or drown, I’m taking the choice away. For the next hour, you aren’t people. You’re extensions of me. I am the list. I am the schedule.”

He pointed at Kioko. “You. Upstairs. Robe on. Now. Then you’re going to pick up every single scrap of trash and bag it. Then, bring every trash bag in this house to the kitchen. If you say one fucking word—just one—I’m taking your phone and smashing it on this counter.”

He turned to Hikari. “Stop thinking about margins. Get the dish soap. Start with the glasses. Hot water, two drops of soap. Don’t think. Just scrub.”

“But the cards—” Hikari started.

“The cards are trash. Scrub the glasses, Hikari. That’s the only Standard that exists right now.”

He looked at his mother. The woman who had birthed him, now reduced to a trembling child. It turned his stomach. “Mother, get a notepad. You’re going to sit here and write down every bill I read off. You’re going to hold the pen, and you’re going to move it when I tell you.”

The room remained still for a heartbeat—the old gravity of their paralysis pulling at them. Kioko opened her mouth to snap back, to keep the “Resistor” mask on, but she saw something in Kenzo’s eyes she hadn’t seen in Tanaka’s. Tanaka had punished out of a need for perfection; Kenzo was acting out of a desperate, cornered need for survival.

“Move,” Kenzo whispered.

Kioko turned and fled up the stairs. Hikari lunged for the sink.

Kenzo leaned against the counter, his heart hammering against his ribs. He had the “Command,” but as he watched his mother’s shaking hand reach for a pen, he felt a terrifying realization: he had just restarted the engine, but he was the only one that knew how to drive. If he let go of the wheel for even a second, they would all go off the cliff.

The clock on the microwave—the only thing in the kitchen that seemed to be working—blinked 1:08 PM.

The “shambles” didn’t disappear just because Kenzo raised his voice. Instead, the house shifted into a different kind of nightmare: forced motion.

Kioko had vanished upstairs, her bare feet slapping against the wood in a rhythm that sounded more like a retreat than a surrender. Hikari was at the sink, her movements jerky and mechanical. She was scrubbing a single glass over and over, her eyes fixed on the suds with a vacant intensity. She wasn’t “cleaning”; she was hiding in the task, applying her perfectionism to washing a glass.

Kenzo turned to the counter, sweeping a pile of junk mail and old takeout menus onto the floor to make room. He grabbed a kitchen chair and dragged it across the tile with a piercing screech.

“Sit, Mother,” he commanded.

Midori obeyed, her body folding into the chair like a discarded rag. She stared at the blank notepad Kenzo had shoved in front of her. Her hand hovered over the paper, holding a ballpoint pen as if it were a strange and dangerous artifact.

“We are starting with the power,” Kenzo said, his voice hard. “The notice on the door says we owe four hundred dollars. Write: Electric. $400.”

Midori’s pen didn’t move. A single tear fell, spotting the paper. “Kenzo ... what if I use the wrong ink? Your father said blue was for personal, black was for official...”

“Use the pen, Mom! Just move the damn hand!”

The outburst sent a shockwave through the room. Hikari dropped the glass into the sink with a splash. From the top of the stairs, Kioko’s voice drifted down, shrill and poisonous.

“Big talk from the guy who’s been gone for four years! You think you can just walk in and play God because you have a diploma?”

A second later, Kioko appeared at the top of the landing. She had put on a sheer silk robe—one of her mother’s—but she hadn’t tied the belt. It billowed around her like a shroud as she descended the stairs, carrying two overflowing trash bags. She reached the bottom and swung them with a grunt, letting them thud onto the kitchen floor. One of the bags split, spilling coffee grounds and moldy orange peels across the tile Hikari had just cleared.

“There,” Kioko spat, her face flushed. “There’s your ‘Standard.’ Are you happy? Do I get a gold star, or do I have to get on my knees like Hikari?”

Kenzo looked at the mess on the floor, then at Kioko’s defiant, trembling face. He felt the weight of his father’s belt in his memory—the way Tanaka would have handled this “insolence.” He felt the urge to roar, to crush her spirit until she complied, just to make the chaos stop.

But he caught his breath. He saw the way Mioki, still silent at the breakfast bar, was shrinking into herself, her shoulders hunched up to her ears.

“Clean it up, Kioko,” Kenzo said, his voice dropping to a whisper that was more terrifying than the shout. “Get a new bag. Pick up every single coffee ground with your fingers if you have to. And if you roll your eyes at me one more time, I’m going into your room and I am throwing every stick of makeup you own into the incinerator. You want to act like a child? I’ll treat you like one.”

Kioko’s mouth opened, then snapped shut. The threat to her “mask”—her makeup, her only remaining bit of self-expression—hit home. She dropped to her knees and began clawing the wet trash back into the bag, her breath coming in ragged, angry huffy.

 
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