The Mizunoe Auto corporate campus occupied a glass-and-steel complex on the eastern edge of Shinkai, a monument to the republic's postwar manufacturing miracle. Haruki Kuze arrived at 7:15 a.m., before the public relations team could assemble their defenses. He carried a warrant and a thermos of black coffee, both of which he expected to need.
The security director met him in the lobby—a gaunt man named Taniguchi whose laminated badge hung from a retractable cord like a leash. "You're here about the Seraph sedan," Taniguchi said. It was not a question.
"The remote access module," Kuze said. "I need to speak with whoever designed it."
They rode the elevator to the fourth floor in silence. The hallways hummed with recycled air and the faint citrus scent of industrial cleaning solution. Taniguchi led him to a conference room where a woman in her late thirties sat behind a laptop, her blunt-cut bangs falling across eyes that had the weary sharpness of someone who had been awake since midnight.
"Mira Ishikawa," she said, rising to offer a handshake. "I'm the lead architect for Mizunoe's connected vehicle platform. Your office sent the warrant parameters last night. I've prepared everything."
Kuze took a seat across from her. The conference table was scattered with technical schematics printed on A3 paper, their lines reduced to blue smudges from repeated handling. "Tell me about the override function."
Ishikawa rotated her laptop to face him. The screen displayed a simplified diagram of a sedan with highlighted nodes at each wheel, the engine block, and the central dashboard console. "The Seraph's remote access system allows an authorized user to monitor and, in emergency circumstances, take control of the vehicle from any paired device. It was designed for antitheft recovery and parental monitoring—not for what you're investigating."
"What constitutes an emergency circumstance?"
"Legally, a police report of theft or a medical incapacitation alert from the driver's biometric monitor. Technically..." She hesitated. "Technically, the system relies on user-defined permissions. If someone has root access to the vehicle's control unit and the paired tablet, they can override the safety protocols without triggering an alert."
Kuze pulled out his phone and showed her the enhanced frame from Yuna's livestream. "This interface. Is this the remote access dashboard?"
Ishikawa zoomed in on the image, her expression tightening. "Yes. That's the over-the-air update screen. It's not supposed to be accessible to end users. This requires developer credentials."
"Who had developer credentials for the Seraph platform?"
"I'll need to pull the access logs." She typed rapidly, her fingers striking the keys with the precision of a concert pianist. "But I can tell you one name without looking. Yuna Hoshino—though she was Yuna Morikawa when she worked here. She was on my team for two years before her dismissal."
Kuze felt the hair on his forearms prickle. "Tell me about her dismissal."
Ishikawa stopped typing. She folded her hands on the keyboard and looked at him with an expression that was half regret, half lingering unease. "Yuna was brilliant. Truly brilliant. She could see architecture flaws that the rest of us missed, and she had an intuitive grasp of user behavior that made her designs elegant in ways the engineers couldn't replicate. She was also... singularly focused. When she wanted something, she pursued it with an intensity that could be uncomfortable to witness."
"What did she want?"
"A promotion to senior architect. She was qualified, arguably overqualified. But there were concerns about her temperament. She had difficulty accepting feedback. She became defensive when colleagues found bugs in her code. The final incident involved unauthorized access to the vehicle telemetry database. She downloaded three terabytes of driver behavior data without authorization—claimed she needed it for a user experience study, but she'd bypassed three security layers to get it. The board voted to terminate her."
"When?"
"Six years ago. She was already engaged to Junichi Hoshino by then. I remember her saying she was going to focus on her personal brand. We all thought she meant a consulting business." Ishikawa's mouth pressed into a thin line. "We were half right."
Kuze made a note. "The remote access dashboard in the livestream—could she have accessed it using credentials she retained from her employment?"
"Not officially. We rotate security keys every ninety days. But Yuna was part of the team that designed the rotation protocol. If anyone could build a persistent backdoor, it would be her." Ishikawa pulled up the access logs and turned the screen toward him. "The vehicle's telemetry shows the collision avoidance system was manually disengaged at 10:42 p.m. The command originated from a device with a MAC address that matches the tablet in the livestream footage. The biometric authentication log says it was unlocked by the registered owner's fingerprint."
Kuze read the log entry twice. "Junichi's fingerprint."
"Yes. But the command sequence was initiated from Shinkai's Nishi-Minato ward, approximately four kilometers from the crash site. Junichi's phone was pinging the same cell tower at the time of the accident." She paused. "So was Yuna's."
"Meaning either of them could have been holding the tablet."
"Or someone else entirely. The authentication only checks the fingerprint on unlock. After that, the session remains active until the device sleeps."
Kuze sat back in his chair. The air conditioning cycled on with a soft rattle. He thought about Yuna's glitched smile, the tablet glowing in the mirror, the dead woman's chrysanthemums wilting at the curb. "Could someone intentionally cause a crash using this system?"
Ishikawa was silent for a long moment. "Yes," she said finally. "If they had the tablet, the credentials, and the knowledge to bypass the safety interlocks, they could disable the brakes, accelerate the vehicle, and lock the steering column. The driver would be unable to regain control. It would look, to any accident reconstruction, exactly like a drunk driver running a red light."
—
That afternoon, Kuze visited the Nishi-Minato Detention Center. It was a low concrete building in the shadow of the port cranes, smelling of industrial disinfectant and stale regret. A guard escorted him to an interview room where Junichi Hoshino sat on a metal stool, his hands cuffed loosely in front of him.
Kuze had studied the man's public image before arriving: the husband in the vlogs, always slightly off-center, always smiling at Yuna with the dazed devotion of someone who had never quite adjusted to his own good fortune. In person, stripped of the camera's forgiving glow, Junichi looked smaller. His shoulders caved inward. His eyes were red-rimmed and unfocused, drifting toward the corners of the room as if searching for an exit that did not exist.
"I didn't do it," Junichi said, before Kuze could speak. "I don't remember anything. I was at home. I had a few drinks, yes. I know that was stupid. I know I shouldn't have gotten in the car. But I don't remember driving. I don't remember the intersection. I don't remember—" His voice broke. "I don't remember hitting anyone."
Kuze placed a digital recorder on the table between them. "Tell me about the drinks."
"Yuna made me a cocktail. She said I'd been working too hard on my music. She said I deserved to relax." He swallowed. "She was being kind. She's always kind."
"What time was this?"
"Around nine, maybe nine-thirty. I drank it on the balcony. Then I felt strange. Not drunk exactly—different. Heavy. I went inside to tell Yuna I wasn't feeling well, and she was on her livestream. She smiled at me from the vanity and waved me toward the bedroom. The next thing I remember, I was in the car, and the headlights were coming toward me, and then..." He trailed off.
"Then what?"
"Nothing. I woke up in a convenience store parking lot. The police found me there. I don't know how I got there. I don't remember driving. I don't remember the crash."
Kuze watched the man's face carefully. The confusion looked genuine—the fractured recollection of someone whose memory had been chemically interrupted. "Has anyone tested your blood for substances other than alcohol?"
"The toxicology report came back this morning. They said there was zolpidem in my system. A high dose. I don't take sleeping pills. I've never taken sleeping pills." Junichi's voice rose with desperate urgency. "I'm telling you, someone put something in my drink. Someone wanted me in that car."
"Who?"
Junichi looked at the metal table. His cuffed hands trembled. "I don't know."
Kuze leaned forward. "Mr. Hoshino, was your wife ever employed by Mizunoe Auto?"
A long pause. "Yes. Before we married. She was an engineer there. She doesn't like to talk about it. She said they treated her unfairly."
"Did she ever discuss the remote access systems she worked on?"
"No. She never brought her work home. She was very private about her past." Junichi lifted his gaze to meet Kuze's. "Why are you asking these questions?"
"Because the crash that killed Miyu Aoyama was caused by a deliberate override of your vehicle's safety systems, initiated from a tablet registered to your household. A tablet that your wife was holding, reflected in a mirror, approximately four minutes before your arrest."
The color drained from Junichi's face. He opened his mouth, closed it, opened it again. "That's not possible."
"The forensic evidence suggests otherwise."
"Yuna would never—" He stopped. His jaw worked silently for a moment. "She loves me. She's been my entire world for ten years. Everything I have, everything I am, is because of her. She wouldn't—she couldn't—"
"Mr. Hoshino," Kuze said quietly, "how well do you know your wife?"
The question hung in the air like smoke. Junichi stared at him, and in the long silence that followed, something shifted behind his eyes—something that looked, to Kuze's trained gaze, very much like the first crack of doubt.
—
Yuna spent the morning of her husband's toxicology revelation filming a collaboration video with a wellness brand. The set was a rented studio in central Shinkai, all white surfaces and filtered sunlight. She wore a linen dress in pale sage and spoke into the camera with the serene authority of a woman whose life was not falling apart.
"Grief is a process," she said, pressing a jade gua sha tool to her jawline. "It moves through the body in waves. Some mornings I wake up and I can't breathe. Other mornings I feel almost normal, and then I feel guilty for feeling normal. The most important thing I've learned is to let the waves come. Don't fight them. Don't judge them."
The brand representative watching from behind the monitor nodded approvingly. This was good content. Authentic. Vulnerable. Marketable.
During a break in filming, Yuna's personal phone buzzed with a message from her lawyer: Toxicology report shows zolpidem. Junichi's attorneys are filing a motion to suppress the confession. They're claiming involuntary intoxication.
She read the message twice. Her expression did not change. She typed a single-word response—Understood—and returned to her mark on set.
"Shall we do the segment on morning routines?" she asked, and the cameras rolled again.
—
That evening, Kuze sat in his cubicle with the door closed, arranging the evidence on a corkboard he'd wheeled in from storage. The photograph of the glitched smile. The enhanced mirror reflection. The Mizunoe access logs. Junichi's toxicology report. A printed screenshot of Yuna's livestream chat from the night of the arrest, timestamped and annotated.
He added a new item: a single page from the personnel file Ishikawa had reluctantly provided. It was Yuna's final performance review from Mizunoe Auto, dated six years ago. The comments section, written by a supervisor whose name had been redacted, contained one sentence that Kuze had read six times already.
Ms. Morikawa demonstrates exceptional technical ability, but her interpersonal conduct raises concerns. She views colleagues primarily as obstacles or instruments. Recommended for termination.
Kuze pinned the page beside the glitched smile. The two images—the clinical assessment and the frozen triumph—seemed to speak to each other across the corkboard.
His phone buzzed. Renji had sent another file, this one much larger. The accompanying message read: Full archive from SpectreByte. Every stream Yuna Hoshino ever broadcast. I ran a frame-drop analysis on all of them. You need to see this.
Kuze downloaded the file. It contained a spreadsheet listing every glitched frame SpectreByte had captured across Yuna's three-year streaming history: sixty-seven instances of corruption, all attributed by the platform's diagnostics to bandwidth fluctuations. Renji had cross-referenced each glitch with the visual content visible in the corrupted frame.
On forty-one occasions, the glitch revealed something that the clean feed did not: a document on Yuna's vanity, a notification on her tablet, a reflection in the window behind her. Most were mundane—shopping lists, calendar reminders, a half-finished cup of tea. But twelve of the captures showed fragments of the Mizunoe remote access interface, always in the background, always just barely visible before the feed corrected itself.
The oldest capture was dated two years before the crash. The interface had been open to a vehicle diagnostic page. The vehicle identification number was Junichi's Seraph sedan.
Kuze stared at the spreadsheet. Twelve separate occasions. Twelve glitched frames. Twelve glimpses of a woman who had been testing a weapon for two years before she used it.
He typed a message to Renji: Send me everything on SpectreByte. I need to know who they are.
The response came within seconds: Anonymous account. Registered through a Tor exit node. Payment in cryptocurrency. No identifying metadata. A pause, then a second message: Whoever they are, they've been watching her for a very long time.
Kuze leaned back in his chair. The corkboard loomed before him, its constellation of evidence forming patterns he could almost name. Yuna Hoshino had planned this, practiced for it, spent two years making sure she would not make a mistake. But she had not accounted for one thing: the watcher in the dark, the obsessive archivist who caught what no one else was meant to see.
He wondered if SpectreByte had been watching because they suspected, or because they knew. He wondered who else might be hiding in the corrupted frames.
And then, because he was a man who believed in the slow accumulation of facts, he turned back to his terminal and began to read every document in Yuna Hoshino's employment file, beginning with her first day at Mizunoe Auto and ending with the security report that had ended her career.
Somewhere in the city, a woman who sold serenity was preparing for her next livestream. She had a new product to launch, a new story to tell, a new wave of grief to perform. She did not know that two men—one a detective, one an anonymous archivist—were closing in on the truth she had buried beneath layers of curated perfection.
And she did not know that the next time her feed glitched, it would not be a random frame that escaped her control. It would be a cascade.
No comments yet. Be the first to comment!