Becoming Master
Copyright© 2026 by Megumi Kashuahara
Chapter 10: Mikaela Yakamura
BDSM Sex Story: Chapter 10: Mikaela Yakamura - 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 lawyer Kenzo retained was a silver-haired woman named Patricia Henley who had been practicing family law in Los Angeles for twenty-three years and had never lost a termination of parental rights case. She came to the Yakamura house on a Tuesday evening, sat at the dining room table with a leather portfolio and a cup of green tea, and listened to the situation with the practiced stillness of someone who charges four hundred dollars an hour and doesn’t waste a minute of it.
She asked Mikaela direct questions. When did you last see your mother. Where have you been living. How long at the current shelter. Who has been your emergency contact at school. Mikaela answered everything plainly, hands folded on the table, and Patricia Henley wrote without looking down, watching the girl’s face with professional attention.
Afterward she spoke to Kenzo privately for twenty minutes. When she came out her expression hadn’t changed but something in her bearing had settled.
“File Thursday,” she said. “Ex parte emergency guardianship. Judge Reyes handles minors in this district and she moves quickly when the facts are clean. Your facts are clean.”
She was right on both counts.
The ex parte hearing was held four days later in a small wood-paneled courtroom that smelled of old paper and institutional carpet. Patricia Henley presented the documentation with the calm efficiency of someone laying cards face up on a table — shelter intake records spanning fourteen months, school attendance files showing perfect consistency, a sworn statement from the shelter director confirming no parental contact in over a year, Mikaela’s birth certificate, her mother’s last known address in Nevada, two prior reports to child protective services that had gone nowhere for lack of follow-through.
The opposing chair was empty. There was no one to oppose.
Judge Reyes was a compact Filipino woman in her fifties who read every page of the filing before she looked up. She had seen a great many of these cases and could usually tell within the first minute whether she was looking at genuine circumstance or manufactured convenience. She looked at the documentation, looked at Patricia Henley, looked at Mioki sitting straight-backed in the gallery with her hands folded, and made her assessment.
“Where is the minor?” she asked.
“Waiting in the hallway with my associate, Your Honor.”
“Bring her in please.”
Mikaela had worn the white blouse Mioki laid out for her that morning. She walked in with her shoulders back and her eyes forward and sat in the chair across from the judge’s bench feeling very small and very visible simultaneously. Judge Reyes looked at her for a moment without speaking, the way adults sometimes did when they were deciding whether to treat you like a child or a person.
She apparently decided on person.
“I’m going to ask you some questions,” she said. “I need honest answers. Not what you think I want to hear — what’s actually true. Can you do that?”
“Yes ma’am.”
“How long have you been living at the shelter on Figueroa?”
“Fourteen months.”
“When did you last have contact with your mother?”
Mikaela held the judge’s gaze. “The night she left; almost two years. I was twelve.”
“Have you tried to reach her since?”
“Three times in the first month. The number stopped working.”
Judge Reyes made a note. “Tell me about the Yakamura household. How did you come to know them.”
So Mikaela told her. Not everything — not the collar sitting cool against her throat, not the heart-shaped tag currently resting in her jacket pocket per the morning routine she had already made her own. But the truth underneath all of that, which was also true: that Mioki had seen her, had learned her situation, had brought her to dinner and listened to her whole story and then said I want you to stay. That she had eaten a meal at a table with a family for the first time in three years. That she had slept in a real room with a door that locked and woken up and it was still real.
“Do you feel safe in that home?”
“More than I’ve felt anywhere.”
“Do you want to live there permanently?”
Mikaela’s throat tightened. She kept her voice level. “Yes ma’am. More than anything I’ve ever wanted.”
Judge Reyes looked at her for another moment, then made a final note and closed the folder.
“Temporary guardianship granted. Mr. Yakamura assumes immediate custody pending full hearing. Minor is to be removed from shelter enrollment today.” She looked over her reading glasses at Patricia Henley. “Schedule the full hearing for six weeks out. I want a home study completed in three.”
She looked back at Mikaela one last time with an expression that wasn’t quite warmth but was adjacent to it — the professional satisfaction of someone who occasionally gets to do the right thing efficiently.
“You’re going home,” she said.
In the hallway outside the courtroom, before they reached the doors, Mikaela paused. Reached into her jacket pocket. Clicked the heart-shaped tag back onto the O-ring at the base of her throat.
Property of Mioki Yakamura.
She straightened it with one finger and walked out into the light.
The room Mioki had given her was at the end of the upstairs hallway, with a window that faced the garden. Mikaela woke on the first morning genuinely unsure, for a suspended moment, where she was.
Then she remembered. And lay still for a long time, letting that fact settle over her like something warm.
She had a desk. A closet with hangers already in it. A bathroom with towels that matched. Small things that the shelter had not had and that she had stopped noticing she missed until they were suddenly present again, arrayed around her as if they had always been waiting.
She made her bed with military precision every morning without being asked. Learned the household’s rhythms within the first week — when Kenzo preferred quiet, when the kitchen was free, how to move through spaces that weren’t yet fully hers without disturbing what was already in motion. She watched carefully and said little and worked hard not to take up more space than she’d been given.
Mioki noticed. Mioki noticed everything.
“You don’t have to earn this,” she said one evening, finding Mikaela rewashing dishes that were already clean. Her voice was even, not unkind. “You’re already here. It’s already decided.”
Mikaela set the dish down. Her hands were still for a moment.
“I know,” she said. “I just don’t know how to stop.”
Mioki looked at her for a long moment. Then she handed her a towel and stood beside her while she dried, and said nothing further, which was its own kind of answer.
It was the end of the first week when Mioki called her into her room in the evening and closed the door.
The room was quiet and lamp-lit, and Mioki was sitting in the low chair by the window in the particular way she had of occupying space — contained, unhurried, the whole room organized around her stillness. She looked at Mikaela standing in the doorway and said simply, “Come here.”
Mikaela crossed the room and went to her knees without being asked, which she understood even as she did it was the right answer — not performed, not calculated, simply true. The position that felt like herself.
Mioki was quiet for a moment, looking down at her. Then she reached out and touched the silver herringbone chain at her throat — the collar that hadn’t left Mikaela’s neck since the afternoon it was placed there, except in the school hallway where the tag came off and went back on like a twice-daily sacrament.
“Tell me what this means,” Mioki said. “Not what you said in the stairwell. What it means now. In this house.”
Mikaela steadied her breathing. She had thought about this — had been thinking about it since the first night, turning it over in the dark the way you turn over something you want to understand completely before you say it aloud.
“It means I belong to you,” she said. “Not as a guest. Not as a ward. Yours. Completely and permanently, the way Mei is yours. I serve you. I obey you. I don’t have a self that exists outside of what you allow me.” She paused. “And it means I’m not afraid of that. I chose it knowing what it was. I’d choose it again.”
Mioki studied her for a long moment.
“And what am I to you?” she asked. “Say it properly.”
Mikaela held her gaze. “My Mistress. My owner.” A breath. “My family.”
Something in Mioki’s expression shifted — not softening exactly, but deepening, the way still water deepens when you look past the surface. She stroked Mikaela’s hair once, slowly, from crown to nape.
“You understand this is not temporary,” she said. “I don’t collar girls and reconsider. I don’t tire of what I’ve committed to. The collar stays. The tag stays. You stay. Whatever your life becomes — school, work, the years ahead — you are mine through all of it. That doesn’t have an end.”
“I know,” Mikaela said. And then, because it was true and she wanted it said: “I’m counting on it.”
Mioki was quiet for a moment. Then she said, “Get up,” and when Mikaela rose she pulled her down onto the chair beside her and held her there in the lamplight with a steadiness that felt like the first solid thing Mikaela had leaned against in years.
They sat like that for a long time. No words necessary. The covenant already made, already irrevocable, already real.
Mei found her in the garden on the fourth day.
Mikaela had gone out in the early morning with a cup of tea, needing air and quiet, and she was sitting on the low stone bench near the back hedge when she heard soft footsteps on the path. She looked up and found Mei standing a few feet away with her own cup, watching her with the calm dark eyes that Mikaela had first noticed in homeroom — careful, attentive, missing nothing.
“You don’t have to leave,” Mei said, reading her instinct to rise. “There’s room.”
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