The sea no longer flowed in a simple rhythm.
By dawn, the currents beneath the Aurealis had begun to twist unnaturally, pulling in conflicting directions as if the ocean itself were converging toward a singular point. The winds sharpened, spiralling rather than gliding, and even the waves lost their usual predictability.
Maris stood at the bow, her gaze steady as faint green awareness threaded into the waters below. What she sensed was not chaos—but convergence.
"We're close," she murmured.
At the helm, Namiya adjusted the compass again, then frowned slightly. "The readings are fluctuating. Currents are no longer linear… they're funnelling."
Aoi leaned forward from the mast, eyes widening as something immense began to form on the horizon. "Uh… Captain?"
Through the early mist, a colossal structure emerged—towering, unnatural, and unmistakable.
A mountain rising from the sea itself.
But unlike any ordinary landmass, streams of ocean water surged upward along its slopes, climbing against gravity in powerful torrents that roared toward its peak.
Kuroha's crimson eyes narrowed. "So this is the legendary passage…"
Maris nodded once. "The Reverse Mountain."
The air grew heavier with mist as they approached. The roar of ascending water echoed like distant thunder, and the surrounding sea was no longer calm—it was being drawn forward, guided by immense converging currents that led directly to the mountain's base.
Pia gripped the railing, eyes sharp despite the awe in them. "Water… flowing upward. That's not natural."
"No," Namiya replied calmly, though her hands tightened slightly on the helm. "It's a forced current system. A sea route that defies gravity itself."
Aoi let out a low whistle. "And we're riding that thing… to reach the North Blue."
Maris' voice remained soft but firm. "Prepare the ship. Secure all loose equipment. This ascent will require full coordination."
The Aurealis adjusted its course as the surrounding currents intensified, pulling the ship toward one of the massive channels carved into the mountain's face. The sea here surged upward in a relentless stream, the water roaring like a living force determined to climb the peak.
"Channel alignment confirmed," Namiya called. "If we miss the entry stream, we'll be pushed back into open waters—or worse, into another current path."
Gina tightened the ropes along the deck. "Everyone, secure your footing! This won't be a gentle ride."
Pia moved swiftly, fastening her satchels and stabilising her spice vials with practised precision. Even her usually calm demeanour sharpened into full focus.
Lumi sat cross-legged on the grassy deck stage, her fingers resting lightly on her instrument. Instead of playing loudly, she began producing low, steady notes—measured and grounding, meant to stabilise the crew's rhythm as tension rose.
The Aurealis entered the current.
Instantly, the shift was overwhelming.
The sea surged beneath the hull, no longer horizontal but climbing in a steep ascent. Water crashed along the ship's sides, mist spraying across the deck as gravity seemed to tilt beneath their feet.
Aoi gripped the mast with a grin that was half thrill, half disbelief. "We're actually climbing the ocean!"
Namiya's voice remained steady. "Maintain sail angle! If the wind catches us wrong during ascent, we'll lose balance."
Maris stepped forward, one hand lightly extended. Beneath the hull, faint green energy shimmered, not forcing the current—but stabilising the ship's interaction with it, allowing the Aurealis to move in harmony with the surging flow rather than resisting it.
"Do not fight the current," she instructed calmly. "Adapt to its rhythm."
Kuroha moved silently across the deck, adjusting positions and ensuring no crew member lost balance. "Formation stability holding."
Pia released a subtle aromatic powder into the air—not to obscure vision, but to sharpen alertness and reduce dizziness caused by the unnatural ascent. The scent of warm spice cut through the cold mist, grounding the crew's senses.
"Anti-disorientation blend," she said briefly.
Aoi blinked, then smirked. "Okay, that actually helps."
The climb intensified.
The roaring water thundered louder as the Aurealis surged upward along the mountain's channel, surrounded by torrents of ocean racing toward the peak. Mist thickened, winds howled in spirals, and the sky above seemed impossibly distant.
Yet the ship remained steady.
Not rigid.
Not strained.
But adaptive.
Lumi's melody deepened, synchronising with the ship's motion, each note flowing in time with the rising current. The rhythm steadied the crew unconsciously, turning chaos into coordination.
Maris' eyes remained fixed ahead, reading the subtle shifts in current density and wind pressure.
"The peak is near," she said quietly.
And then—
The ascent crested.
For a single breathless moment, the Aurealis reached the summit of the Reverse Mountain, suspended at the apex where multiple ocean currents converged from different Blues. From that height, the vastness of the sea stretched endlessly in all directions, the sky wide and open above the roaring convergence below.
Even Gina fell silent.
"…Incredible," Pia whispered.
But the moment did not last.
Because beyond the peak, the current shifted again.
Downward.
"The descent channel is forming!" Namiya called.
Ahead, a powerful stream of water surged downward along the opposite slope of the mountain—leading toward colder, deeper seas.
"North Blue route confirmed," Maris said.
The Aurealis tilted as gravity reclaimed its dominance, and the ship was carried into the descending torrent. The fall was faster than the climb, the water rushing beneath them in a controlled but powerful plunge.
Aoi laughed breathlessly. "This is definitely not a normal sea route!"
"Hold positions," Kuroha ordered quietly.
Pia secured her footing, adjusting her satchels as the wind grew colder by the second. "Temperature drop is immediate… the air density is changing."
The mist gradually thinned.
The roar of ascending waters faded behind them.
And the sea ahead opened wide.
When the Aurealis finally emerged from the descending current, the waters had changed entirely.
The ocean was darker, deeper blue, and the wind carried a cooler, sharper edge than the warm currents of the South Blue they had left behind.
Namiya checked the compass, then exhaled softly. "Coordinates stable. Current patterns confirmed."
Aoi tilted her head, scanning the horizon. "Feels different. Quieter."
Kuroha nodded. "Denser seas. Fewer trade routes."
Pia inhaled slowly, sensing the shift in climate. "Spice dispersal will behave differently here. I'll need to recalibrate my blends."
Maris rested her hand lightly on the railing, her awareness brushing the unfamiliar northern currents beneath the hull.
The sea felt calmer.
But heavier.
Older.
"We have arrived," she said softly. "North Blue."
Behind them, the towering silhouette of the Reverse Mountain faded into the mist, its impossible currents still roaring in the distance—a reminder of the passage they had conquered not through force, but through coordination and adaptation.
Lumi played a gentle new melody, deeper and steadier than before, echoing the transition of their voyage.
Gina grinned, rolling her shoulders. "New sea, new challenges."
Aoi smirked from the mast. "And stronger opponents, probably."
Pia adjusted her satchels with quiet resolve. "Then preparation becomes even more important."
Maris' gaze lingered on the northern horizon, where faint silhouettes of distant islands rested beneath the cool sky.
"The South Blue journey has ended," she said calmly. "From this point onward, we sail the North Blue."
The Aurealis surged forward under the colder winds, sails full and steady, its crew sharper and more unified than before.
A new sea stretched endlessly ahead.
And with the Reverse Mountain behind them, the next chapter of their voyage had truly begun.