The Uninhabited Island. Class A Campsite.
Pristine white sand curved along the shoreline like a drawn bow, backed by the dense, impenetrable green of tropical jungle and fronted by an endless expanse of azure sea. The sun was a hammer; the salt breeze, a constant, humid presence against the skin.
Mashima Tomoya had completed his distribution of basic supplies and the crucial "Exam Guide" booklet. His departure, like those of the other homeroom teachers, left the students alone with their supplies and their choices.
In the center of the campsite, the neat stack of survival equipment drew attention from all quarters. Totsuka Yahiko worked through the inventory with methodical precision. "Two tents, four flashlights, water rations... All present. The teacher's list was accurate."
Nearby, Katsuragi Kohei's bald head gleamed under the merciless sun. He sat cross-legged on the sand, the Exam Guide open before him, his attention so absolute that he might have been alone on the beach. Every rule, every clause, every potential loophole was being digested and catalogued.
With Sakayanagi Arisu absent—her health preventing participation—the organizational burden had fallen naturally to Katsuragi's faction. Several of his closer associates moved through the group, assigning initial tasks, maintaining order, ensuring the camp's basic functionality.
But despite these efforts, eyes kept drifting.
To the other end of the beach.
Sakamoto was moving.
His body swayed to a rhythm only he could hear, a silent music that guided his feet across the soft sand in patterns both fluid and strange. He glided backward, leaving smooth arcs like the wake of a boat on still water. He spun on his toes, carving dense circles into the white surface. He leaned at angles that defied gravity, heels digging deep furrows as he moved.
It was not exercise. It was not training. It was dance—a tribute to the King of Pop himself, Michael Jackson, rendered on this remote island stage with the same impossible precision Sakamoto brought to everything.
The Class A students watched in contemplative silence.
If anyone else had done this, they would have been puzzled. Bemused. Perhaps even concerned. But this was Sakamoto. And Sakamoto did nothing without purpose. His every action contained meaning, even when that meaning was not immediately apparent. They had learned this lesson too many times to doubt it now.
The invisible music ended. Sakamoto's movements ceased.
He adjusted his breathing—a slight expansion and contraction, barely perceptible. His hand rose, middle finger finding the bridge of his glasses, pushing them into perfect position despite the exertion that had just occurred.
His gaze swept across the assembled students, calm and assessing. Then, almost imperceptibly, it dropped—lingering for a fraction of a second on the sand he had just "danced" upon.
He said nothing.
He turned and walked to a cluster of coastal rocks at the camp's edge, settling onto a shaded perch with his back to the group, facing the endless sea.
He left behind a beach covered in marks. Arcs and circles and lines, seemingly random, apparently chaotic.
The silence he left behind was filled with unspoken questions.
"What does it mean?" someone finally whispered.
"These marks... they're everywhere. Is there a pattern?"
"He must have a reason. Sakamoto-kun always has a reason. We just haven't found it yet."
The murmurs built, a low tide of speculation washing over the camp. Students moved closer to the marked sand, peering at the patterns, trying to find meaning in the chaos.
Katsuragi closed his Exam Guide. He had absorbed its contents; the rules were now mapped in his mind. He rose, his gaze turning toward the solitary figure on the rocks.
He needed to speak with Sakamoto. About the island's terrain. About potential strongholds. About the leadership decisions that would shape their exam strategy.
He took a step.
"OH—! OH OH! I SEE IT! IT'S SO OBVIOUS! SAKAMOTO-KUN IS INCREDIBLE!"
The voice cut through the murmurs like a blade through fog.
Every head turned.
Morishita Ai crouched at the edge of the marked sand, her sky-blue pigtails bouncing with barely contained excitement. Her face was alight with the particular gleam of someone who had just solved a puzzle everyone else was still struggling to understand.
She was, by general consensus, Class A's second-most eccentric student. Her thought processes operated on frequencies others could not always access. But her observations—when they crystallized—were often devastatingly accurate.
Hashimoto Masayoshi watched her with the resigned expression of someone who had learned to expect the unexpected. "Morishita. What exactly did you see? Elaborate."
Morishita shot him a look—quick, dismissive, aware of his calculating nature but uninterested in it at this moment.
She pointed.
Not at a single mark, but at a configuration—a cluster of sand mounds and furrows that, viewed together, formed something larger than their individual parts.
"Everyone! Look here!" Her voice rang across the beach. "Now look at our surroundings! At the actual terrain! Doesn't it look familiar?"
The effect was immediate.
Class A students leaned forward, their gazes shifting between the marked sand and the natural features of the campsite. The curve of the shoreline. The angle of the jungle's edge. The position of the coastal rocks where Sakamoto now sat.
Katsuragi froze mid-stride. His eyes, sharp with sudden comprehension, swept across the beach.
And then he saw it.
The marks were not random. They were not dance practice. They were a map.
The arcs traced the shoreline's exact curvature. The circles marked optimal tent placements relative to sun and wind. The heel-drawn furrows indicated the safest paths into the jungle—routes that avoided the densest undergrowth and most treacherous terrain. The entire beach, transformed by Sakamoto's "dance," was now a scaled representation of their immediate environment, complete with annotations only a trained eye could read.
Morishita was bouncing on her heels now, unable to contain her delight. "He drew it! While dancing! He mapped the entire area so we could see it all at once! That's why he did it on this part of the beach—it's the only flat, open space large enough to show the full layout!"
The murmurs died. In their place, a new sound rose—the quiet intake of breath as twenty students simultaneously recalibrated their understanding of what "extraordinary" meant.
Katsuragi's gaze traveled from the sand-map to the solitary figure on the rocks.
Sakamoto had not turned. Had not acknowledged the revelation. He simply continued gazing at the sea, as if he had done nothing more remarkable than take a morning stroll.
But he had given them everything they needed to begin.
A map. A message. A quiet demonstration that even here, on this remote island, in this unfamiliar environment, he was already three steps ahead.
Katsuragi released a slow breath. His earlier intention—to consult Sakamoto about strategy—suddenly felt almost absurd. Sakamoto didn't need to be consulted. He had already anticipated every question Katsuragi might have asked and provided the answers before the questions could be formed.
What kind of person...
The question went unfinished. But it lingered, as it always did, in the presence of Sakamoto.
Katsuragi turned to the assembled class, his voice firm with new purpose.
"You've all seen the map. Totsuka, coordinate tent placement using the marked circles. Mori, you have the best eye for terrain—plot the jungle entry routes Sakamoto indicated. Everyone else, break into teams. We have work to do."
The camp stirred into organized motion.
And on the rocks, facing the sea, Sakamoto's lips curved in the faintest suggestion of a smile.
Katsuragi Kohei's mind had been working since the moment they disembarked.
Before landing, the Esperanza had deliberately circled the island for more than half its circumference—a leisurely detour that most students had accepted as scenic tourism. Katsuragi had accepted nothing of the sort. He had committed every visible feature to memory: the sharp promontories jutting into the sea, the winding river mouths carving through coastal forests, the rolling ridges that defined the island's spine.
Now, as Morishita Ai's excited revelation pulled his attention to the marked sand, his memory engaged with the patterns before him.
His pupils contracted.
"This is...!"
The exclamation escaped before he could contain it.
The configuration Morishita had highlighted—a cluster of sand mounds and furrows that had seemed random moments ago—now resolved into crystalline meaning. The raised mound corresponded precisely to the low hill behind their camp. The winding grooves traced the exact path of the small stream they had spotted from the ship, flowing from jungle to sea.
Katsuragi's head snapped up. His gaze swept the beach, no longer looking at individual marks but at the totality—the entire expanse of sand that Sakamoto's "dance" had transformed.
Comparison became comprehension.
Those arcs were not arbitrary. They traced the island's coastline with cartographic precision. Those spirals marked elevation changes, the thickness of sand indicating steepness of slope. Those straight lines radiating inland followed the natural drainage patterns, the paths of streams and rivers.
It was not a dance. It was a survey.
"These aren't random marks," Katsuragi's voice carried across the camp, cutting through the murmurs with the weight of revelation. "This is a sand table. A three-dimensional model of the entire island. Sakamoto-kun has mapped our environment in its entirety."
The collective intake of breath was audible.
Students who had been puzzling over individual marks now saw the whole. The long sand ridge curving along one edge—that was the peninsula they had passed during the circumnavigation. The convergence of multiple furrows near the center—the main river's delta system. The graduated thickness of sand mounds—the rising elevation as terrain moved inland.
"My god... it's all there..."
"Look—that matches the coastline I remember..."
"Even the hills... the height is shown..."
Awe rippled through Class A like wind through wheat.
Katsuragi stood motionless, his internal turmoil carefully masked but no less profound for its concealment.
He had planned to approach Sakamoto. To share his own memorized observations. To collaborate on strategy. To demonstrate that he, too, could contribute to the class's success.
And Sakamoto had already—already—rendered all of that unnecessary. In the brief window of the ship's circumnavigation, he had not merely observed. He had memorized. And in the few minutes since landing, he had transcribed that memory into a physical model, accessible to everyone, created through nothing more than a dance on sand.
What kind of mind operated at this level? What kind of awareness processed environmental data so completely, so instantly, that it could be reproduced with such fidelity through mere physical movement?
Katsuragi did not have answers. He only had the evidence before him, and the humbling recognition that the gap between himself and Sakamoto was not a gap he could bridge. It was a canyon. A different order of existence entirely.
He exhaled slowly. Composure returned.
"Everyone." His voice carried authority once more. "We have been given an extraordinary advantage. This is not merely a map—it is a three-dimensional model incorporating elevation and terrain features. We can use it to identify optimal base locations, plan efficient exploration routes, and coordinate our efforts before we take a single step inland."
The class gathered around the sand table, energy transforming from confusion to focused purpose. Discussions erupted—where to search first, how to divide exploration teams, which landmarks would make the most promising base sites.
Katsuragi left them to it.
He walked across the soft sand toward the cluster of coastal rocks where Sakamoto sat alone, facing the sea.
The breeze caught Sakamoto's hair, stirring it gently. His posture was relaxed, his attention fixed on the endless horizon. He did not turn at Katsuragi's approach.
Katsuragi stopped beside him, looking out at the same sea.
"This sand table." His voice was quiet, sincere. "It's extraordinary. Thank you. On behalf of everyone."
Sakamoto's response was a faint murmur, barely audible above the waves. "It was nothing. Katsuragi-kun overestimates my contribution."
Katsuragi let the silence stretch. Then, carefully, he asked the question that had been forming since the revelation.
"The leader selection. For occupying bases—the key card must be activated by the designated leader." He paused, choosing words with care. "Who do you believe is most suited for that role?"
Sakamoto turned.
Slowly. Deliberately. His hand rose, adjusting glasses with that familiar, elegant gesture.
His gaze met Katsuragi's—calm, unreadable, infinitely patient.
He said nothing.
But the silence was not empty. It was a question returned: What do you think?
Katsuragi understood.
Sakamoto would not decide for them. He had given them the map—the tool, the advantage, the head start. But the choices, the strategies, the leadership—those remained theirs to determine. He would not lead. He would not direct. He would simply be, present and available, while others made their own paths.
Katsuragi nodded slowly. "I understand."
He turned back toward the camp, where his classmates were already organizing around the sand table, discussing, planning, preparing.
The decision was his.
And for the first time since meeting Sakamoto, Katsuragi felt not the weight of inadequacy, but the lift of possibility. The map was there. The tools were in their hands. What they built from them was up to them.
He walked back to join his class.