Haroku stood perfectly still, his eyes locked onto the massive stone box.
He didn't move a muscle. He didn't speak a word.
The atmosphere in the underground chamber had shifted again, growing even heavier than before. The air felt physically dense, carrying an unseen weight—something ancient that simply didn't belong in the normal world.
I stared at the sealed lid for a long moment before finally breaking the silence. "Haroku... this is my grandfather's secret."
My voice sounded strange, even to my own ears. It wasn't loud, but it carried an undeniable edge.
He turned toward me slowly, profound confusion written across his face.
"So... how are we even supposed to open it?" he asked. He took a half-step closer, but stopped. Even without fully understanding the entity inside, his survival instincts told him not to touch the stone.
I took a slow, measured breath. "First, we take it upstairs," I told him. "Then, we open it using the Hinomi Key."
He froze. "The... what?"
"The Hinomi Key," I repeated evenly.
He stared at me, his mind struggling to process the bizarre terminology. I could practically see the questions forming in his head.
What kind of key is that? Why does it have a specific, named title? And more importantly—what exactly is inside a box that requires a specialized key to unlock it?
His gaze drifted back to the massive vault. He wasn't just looking at its physical size anymore; he was sensing its density. It was explicitly designed not to be moved by ordinary means.
"Whatever this is," he said slowly, "we just need to investigate it." He tried to sound steady, but I could hear the faint tremor in his tone. He felt the exact same deep-seated unease that I did.
After a moment, he looked back at me. "But how are we even getting this thing upstairs?"
I didn't answer right away. I looked at the stone box, and then back to him. "An ordinary human can't lift it."
He blinked, thoroughly confused. "What do you mean?"
"I mean that even if four strong men tried to lift it together... it wouldn't budge a single inch."
The silence that followed was immediate and heavy.
"...Then how are we supposed to move it?"
I met his eyes directly. "I said a human can't lift it." I let the words hang in the air for a second. "But a spirit can."
The moment those words left my mouth, the room reacted. The temperature plummeted instantly. The air turned biting and sharp.
Something shifted directly above the stone vault. It was a visual distortion, barely visible in the dim light, like heat waves rising off asphalt.
And then, the massive box lifted.
It didn't rise slowly. It didn't look like it required any effort. It simply broke the laws of gravity and hovered.
Haroku stumbled backward instantly, his stoic expression cracking completely. There was absolutely nothing holding it. No visible force. No physical contact.
And yet, it floated. It was perfectly controlled and steady, as if an unseen giant were carrying it with absolute precision.
Haroku didn't say a word. He physically couldn't.
We followed the floating vault as it drifted out of the chamber and upward toward the ground floor, guided step by step by the invisible guardian.
When we reached the main living room, the box lowered itself gently onto the hardwood floor. The sound it made upon impact was incredibly soft, yet dense. Final.
Total silence returned to the house. Haroku was still staring blankly at the stone, his brain desperately trying to process the casual display of overwhelming telekinetic power he had just witnessed.
I turned slightly toward the empty space beside the box. "Where is the key?"
The presence responded immediately. There was a faint ripple in the air, and an object materialized out of the ether, hovering right in front of me.
A key.
Haroku's reaction was visceral. "What... is that?"
It didn't look remotely human-made. It was jagged, with a twisted, asymmetrical structure. The handle resembled a distorted, screaming face—something carved in pure agony or rage. Dark, vein-like patterns ran along its metallic surface, faintly pulsing with a sickly glow, as if the metal itself were breathing.
It didn't look like a tool used to unlock a door. It looked like a cursed artifact that should have been buried and forgotten.
I reached out and took it from the air without a second of hesitation.
Haroku couldn't look away. Every single survival instinct in his body was screaming that something was fundamentally wrong, yet he couldn't tear his eyes away.
I walked toward the box. Each footstep felt deliberately measured. I reached the heavy iron lock mechanism set into the stone and inserted the grotesque key.
For a tense second, absolutely nothing happened.
Then—Click.
The sound echoed unnaturally loud through the quiet house. It didn't sound like mechanical tumblers falling into place. It sounded organic, as if a sleeping beast had just cracked its eye open.
Haroku held his breath.
I gripped the heavy lid and pushed it back. As the vault opened, the atmospheric pressure in the room shifted violently. A faint, low-frequency vibration spread through the floorboards, followed instantly by a steady, ethereal glow spilling out from inside the box.
We both leaned forward to look inside.
There was only a single item resting at the bottom. A rolled parchment scroll.
I reached into the glow and picked it up.
The absolute second my skin made contact with it, the light intensified in a blinding flash, then immediately settled back down into a dull hum. I pulled it out and placed it carefully on the coffee table.
Silence flooded the room once again. Haroku's eyes were locked onto the aged paper.
"What is that...?" he asked, his voice barely a whisper.
I didn't answer his question. Instead, I turned my back to the scroll and faced him fully. "Haroku," I said.
He dragged his eyes away from the table to look at me.
"I'm going to say a specific word," I told him.
He frowned, his confusion deepening. "A word?"
I nodded. "But before I do... I need you to close your eyes."
He hesitated, taking a half-step back. "Why?"
"Just trust me."
That was all he needed. After a tense few seconds, he swallowed hard and gave a stiff nod. "...Alright."
He squeezed his eyes shut.
The exact moment his eyelids closed, the atmosphere warped again. The invisible, observing presence in the room suddenly magnified, pressing in from all sides.
His breathing grew shallow and erratic. I could hear it. I could feel the static electricity rolling off his aura. Even completely blind, he knew something massive was about to happen.
I looked down at the scroll resting on the table.
I took a breath. Then, I spoke.
"Hekonami."