AFTER THE DIVORCE, I BECAME A BILLIONAIRE

CHAPTER 21: THE ARCHITECTURE OF A LEAK

POV: Tae-jun

I awoke to cold sheets and a silent room.

The space beside me on the bed was empty, the dent in the pillow the only remaining proof of the night before. On the marble nightstand, the white face of Seo-rin’s secondary burner phone glowed in the dim dawn light.

She had left it there face-up, directly in my line of sight, before slipping out into the early morning gray. I stared at the illuminated screen, the cold realization setting in: she had deliberately left the device for me to find rather than waking me at four in the morning—her quiet, agonizing way of making sure I absorbed the accusation without her having to watch my face in real time.

I picked up the phone. The words felt like a physical blow to my chest:

I saw you leave together.

Does she know what you did to her mother yet, Young Master?

The accusation landed like a serrated blade, aimed with surgical precision at the fragile, sacred threshold we had crossed just hours earlier. What you did to her mother. My father was dead. Her mother was dead. And somewhere in the dark machinery of Kangseong’s history, someone was implying that my hands—or my father's hands—were covered in Yoon Ah-young’s blood.

I didn't waste time looking for her. I knew her well enough to know she was already running her own play, retreating into the cold, analytical fortress of her mind until she had answers.

I called Choi Dong-wook before I had even pulled on my shirt, my voice tight with a cold, simmering fury I barely kept from boiling over into panic.

"Get Ji-hoon. Bring the security suite," I snapped into the line. "I want a complete, floor-to-to-ceiling sweep of my penthouse. Every frequency, every network node, every camera, every thermal line. Right now."

By seven in the morning, my living room looked like a technical command center.

Ji-hoon moved quietly between the glass walls, coordinating the physical perimeter logs with the quiet, methodical competence that proved my decision to hire him was the smartest move I had made since returning to the city. He didn't ask questions about the glowing phone on the coffee table. He simply secured the space, managing the external security team with firm, steady authority.

Choi Dong-wook worked in grim, absolute silence. The old fixer had brought two specialized signal analyzers, running deep diagnostics on systems I hadn't even realized were wired into my apartment's infrastructure.

"The physical suite is clean, Tae-jun," Ji-hoon reported three hours later, wiping sweat from his forehead. "No optical bugs, no acoustic pick-ups, no RF signals. Nobody physically picked your locks or breached the private elevator landing. The perimeter logs show zero unauthorized movement between midnight and dawn."

I stood by the window, the city gray and wet beneath a heavy blanket of smog. "Then how did an unregistered burner receive a localized text message referencing my bedroom at four in the morning?"

Ji-hoon looked toward Dong-wook, who remained hunched over his master diagnostic terminal, his weathered face drawn tight, his jaw locked.

"Nothing came through the public commercial towers," Dong-wook said raspy, his fingers flying across his mechanical keyboard. "The message bypassed the local telecom relay entirely."

A cold, sickening dread began to pool in my stomach, heavy as lead.

If no one had physically breached the apartment, and no external radio frequency had intercepted the room, then whoever sent that message reached Seo-rin's encrypted phone using a routing protocol that originated from somewhere already inside my perimeter.

It meant the signal hadn't forced its way into my sanctuary from the outside. It had been broadcast from within the walls I believed were my most secure—inside Kangseong's own private, supposedly airtight network. The exact same private architecture Dong-wook had sworn, repeatedly across three decades, was completely beyond compromise.

I stared down at the glowing text on the coffee table, the venomous words burning behind my eyes.

Does she know what you did to her mother yet, Young Master?

Was it a lie? A psychological wedge engineered by Tae-hyun or Silas Han to tear apart the one genuine alliance capable of breaking the Cheonghwa Council? Or was it an unburied ghost—a horrifying truth my father had taken to his grave, leaving me to face the reckoning?

Either possibility was a trap. If I called her to deny it, I sounded defensive. If I stayed silent, the doubt would fester in her mind until it poisoned everything we had shared in the dark.

A sharp, high-pitched chime echoed from Dong-wook’s diagnostic terminal.

The old man froze. He stared at the glowing green text scrolling across his monitor, his breath catching in his throat, his face draining of what little color it possessed.

Ji-hoon stepped closer to the screen, reading the server trace line by line. "Tae-jun... look at this."

I walked over, leaning over Dong-wook’s shoulder.

The final line of the diagnostic trace loaded on the screen, highlighted in glaring, neon red, confirming the one truth none of us had wanted to face:

The message had been routed directly through Kangseong Holdings’ primary executive server—originating from an administrative clearance key logged at nine minutes past four in the morning.

Whoever had sent that message didn't hack their way in from the outside.

They held a master key. They already belonged inside.