The alarm bell split the night before I fully understood I was already running.

  By the time I reached the security room, red signal stones were pulsing along the wall map, each flare marking a breach point near the west corridor.

  Margaret stood at the central table, hair slightly disordered for the first time I had ever seen.

  “External intruders confirmed!” she reported. “Five signatures. Coordinated entry.”

  Philip slammed a marker onto the map.

  “They’re converging toward the circle chamber, not the treasury.”

  Alexander’s voice cut through the noise.

  “All units to assigned posts. Lock internal gates. No one fights alone.”

  From the hall outside came a rapid chain of responses—boots, shouted confirmations, the iron scrape of internal bars dropping into place.

  The manor sounded like a living mechanism bracing for impact.

  My pulse hammered so hard it blurred the edges of my vision.

  I reached for Kotori in the middle of the chaos.

  > Enemy count and objective. Confirm now.

  [Kotori]

  ********************

  Probability: 90%

  Detected intruders: 5.

  Primary objective: induce magic-circle runaway state in the core chamber.

  Recommended response: corridor delay, node protection, emergency shutdown readiness.

  ********************

  [Mana: 61/110] (-10)

  I relayed it immediately.

  “Five attackers. They’re aiming for circle runaway, not theft. We need delay and node defense now.”

  Alexander met my eyes, jaw set.

  “Then stay with me. We stop them at the chamber line.”

  I forced my breathing into countable rhythm, the way I did before unstable casting.

  In for four. Hold for two. Out for four.

  Fear still clawed at my ribs.

  But fear with a plan was survivable.

  The west corridor erupted into motion.

  Two masked intruders rushed the front while another pair moved low, trying to slip past toward the service stair that led directly to the circle chamber.

  Alexander intercepted the first strike with his blade, steel ringing against steel in a burst of sparks.

  I cast my first spell into the floor sigils.

  A defensive seal rose in a curved wall of pale force, sealing the side route and forcing the attackers into a narrow lane.

  [Mana: 46/110] (-15)

  One of them hurled a destabilizing glyph into the barrier seam.

  The wall shuddered.

  I answered with a short-range counterburst, punching the glyph out of alignment before it could propagate.

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  The backlash slammed my wrist with numb heat, but the seam held.

  [Mana: 31/110] (-15)

  “Behind you!” Alexander shouted.

  I ducked as a blade flashed past my shoulder.

  He stepped into the strike and took it on his guard, then drove the attacker back with a brutal, efficient riposte.

  No flourish.

  Just survival.

  Then, from the open chamber doorway, a fifth intruder began chanting over the main circle.

  His cadence was wrong—too fast, too forceful, more like prying open a lock than activating a lawful sequence.

  The lines on the floor flickered from blue to unstable violet.

  Runaway initiation.

  Exactly what Kotori warned us about.

  If that loop closed, it would not stop at one room.

  I sprinted into the circle chamber with Alexander at my side and forced my shaking fingers into the emergency sequence I had drilled since day two.

  Skill trigger: Emergency Magic Circle Shutdown.

  I drove mana into the control nodes in reverse order, cut external feed, then severed the amplification bridge before the runaway loop could close.

  For one breathless second, nothing happened.

  Then the violet surge collapsed inward and died.

  [Mana: 16/110] (-15)

  The intruders broke formation the instant the runaway failed.

  Two retreated through the shattered side door, one vanished into smoke, and the remaining pair fled into the dark beyond the courtyard wall.

  Guards pursued; Alexander signaled restraint.

  “Secure first. Chase second.”

  He was right.

  One attacker left behind at the core would be worse than three escaping into the dark.

  Only after the room fell quiet did the full cost hit me.

  My knees gave out.

  The floor came up hard and cold under my palms.

  [Kotori]

  ********************

  Warning: Mana reserve below critical threshold (15%).

  Current reserve: 16/110.

  Immediate rest required. Continued casting may cause collapse.

  ********************

  [Mana: 16/110]

  Alexander dropped to one knee beside me and caught me before I tipped sideways.

  “Easy,” he said, voice rough with fear he was trying not to show. “No more tonight. You’ve done enough.”

  I wanted to answer that I could still stand, still cast, still help.

  But even thinking it felt heavier than armor.

  He carried me to the infirmary despite my weak protest that I could walk.

  The room smelled of clean linen, alcohol tincture, and the bitter-sweet edge of recovery herbs.

  A kettle clicked softly somewhere near the back counter, filling the pauses between voices with ordinary domestic sound.

  Lilia was already there, eyes bright with unshed tears.

  “Don’t ever scare me like that again,” she said, then immediately pressed a blanket over my shoulders.

  Philip arrived with a measured vial of mana recovery tonic.

  “Small dose first,” he said. “Your channels are strained.”

  I nodded and drank.

  Warmth spread slowly, like thawing hands in winter.

  Not dramatic.

  Not instant.

  Just enough to tell me my body had not given up.

  Once my breathing steadied, I used Kotori one more time.

  > Am I stable now?

  [Kotori]

  ********************

  Probability: 84%

  Quick diagnosis: mild mana depletion with acute fatigue.

  Condition is stable. Rest and hydration recommended.

  Avoid additional casting until recovery cycle completes.

  ********************

  [Mana: 6/110] (-10)

  Alexander sat beside the bed and took my hand carefully, as if I might crack.

  “You stayed,” he murmured. “You fought for this house. For all of us.”

  His thumb brushed my knuckles, gentle and grounding.

  “I’m grateful beyond words.”

  He didn’t let go of my hand when he said it.

  My chest tightened for an entirely different reason than battle.

  “I wasn’t alone,” I whispered. “You were there.”

  Near dawn, back in my room, I replayed the night in pieces:

  the bell,

  the corridor sparks,

  the violet surge,

  Alexander’s arms around me as the world tilted.

  They had come prepared to break the circle.

  They would come again.

  I wanted to ask Kotori one more question—how to prepare for the next attack, how to stop trembling before sleep—but I stopped myself.

  No more mana tonight.

  I wrote a single line in my notebook instead:

  Next time, I protect first and collapse never.

  Below it, I added three practical notes before sleep stole my focus:

  1) reinforce corridor choke points,

  2) pre-stage relay signals,

  3) drill shutdown sequence under noise and interruption.

  Outside the window, the first pale light of morning touched the manor roofs.

  I lay down without undressing, hand over my racing heart.

  Afraid.

  Exhausted.

  Determined.