The sound of steady footsteps echoed through the vast corridors of the palace. A tall, imposing figure entered the great library of Asgard—the God of Thunder himself. Thor had come on Odin's orders, for Kurogai Alexander Blackwood had been granted only one day within these sacred halls of magic. That day was over, and it was time to escort him out.

Thor stepped into the vaulted chamber and immediately spotted Kurogai standing before a shelf, a thick tome resting in his hands. The young man's eyes burned with focus, his attention wholly consumed by the words on the page.

"Kurogai, your allotted time has ended," Thor called out.

Slowly, Kurogai blinked back into awareness. He closed the book with deliberate care, then exhaled with the faintest smile. "Already? Time slips by faster than one expects."

"Yes," Thor replied firmly, though his grip on Mjolnir tightened. "It is time to return you to Midgard. I will take you to the Bifröst myself."

The wariness in his tone was subtle, but present. Over the past two days, Thor had learned that Kurogai was not a man easily controlled. He spoke lightly, but his actions revealed an unsettling independence. Thor worried that this enigmatic figure might refuse to leave, enchanted as he clearly was by Asgard's vast library.

Yet, to Thor's surprise, Kurogai merely nodded. He slid the tome back into its place and said calmly, "In that case, let us go."

Thor blinked in surprise, momentarily caught off guard. He had expected resistance, perhaps even defiance. Instead, Kurogai's cooperation was disarming. With a small grunt of relief, Thor gestured toward the exit. Together, they stepped from the chamber, the golden doors of the magic vault closing heavily behind them.

But when the last echo of their departure faded, the silence was broken. Deep within the sealed chamber, space itself twisted. A spiraling distortion shimmered into existence, and from it stepped a figure cloaked in dim light, eyes glinting a blood-red hue.

Kurogai Alexander Blackwood.

"How could I leave Asgard before raising the second pupil ring?" he murmured with a sly smile.

Thor had been correct to suspect him. Kurogai had no intention of abandoning Asgard's treasure trove of magical knowledge. The Ultimate Pupil was his highest priority, and this opportunity was too precious to waste.

In truth, Kurogai could have overpowered Thor and demanded to remain, but that would have brought endless duels with Asgard's warriors. Though he feared no one even Odin himself, endless battles would only distract him from what mattered: learning. And so he had chosen another way.

With the sixth pupil ring's ability—Falling Cherry Blossoms—he had crafted a flawless doppelganger, indistinguishable from his true self. Thor now escorted that clone, believing it to be the real man, while Kurogai himself hid safely within the warped dimensions of his Kamui space.

This deception gave him what he craved: silence, solitude, and time to consume Asgard's knowledge undisturbed.

"Now I can read in peace," he whispered, reopening his pupil's power as he plunged once more into the ocean of arcane texts.

Meanwhile, upon the Rainbow Bridge, Thor and Kurogai's doppelganger approached the guardian of Asgard. Heimdall stood tall, sword in hand, his gaze as sharp as ever.

"Heimdall," Thor called, "open the Bifröst and return Kurogai to Midgard."

The Watcher's golden eyes fell upon the figure at Thor's side. For a long moment, he studied him, silent as stone. Then, with a slow nod, Heimdall turned and walked toward the central platform.

"I see," Heimdall intoned. He raised the great sword Hofund and drove it into the mechanism. The rainbow energy surged to life, a shimmering torrent of light spilling across the bridge.

Neither Heimdall nor Thor noticed the faint, knowing smirk tugging at the corner of the doppelganger's lips. The plan had succeeded. Kurogai had feared that Heimdall's all-seeing gaze might pierce his illusion, yet the doppelganger carried the same aura and power as the true body. Even the Watcher could not distinguish between them.

"Have a safe journey, Kurogai," Thor said, his tone almost warm now after their time together.

The doppelganger chuckled lightly, waving as the Bifröst consumed him. "I believe we will meet again, Thor."

In a flash of prismatic light, the figure vanished, carried down the bridge of worlds to Earth.

Thor exhaled, lowering Mjolnir. "It is done."

But Heimdall remained silent for a long moment, his expression grim. When he finally spoke, his words were weighted with unease.

"Thor, be wary of that man. My sight cannot pierce him as it does others, but still, I sense it. He will not settle for mediocrity. He will shape great and terrible things in this world."

Thor turned his head, solemn. "I know. From the moment I crossed blades with him, I understood. Kurogai is no ordinary man. He is… dangerous."

And as the Bifröst's light faded into the night sky, Asgard remained unaware that the true Kurogai still walked its halls, drinking deeply from the wellspring of its ancient magic.