Koudo Ikusei High School. Summer's end.
The sun poured down in molten sheets, bleaching the concrete and shimmering off the surface of the school's Olympic-standard pool. In the long shadow of the entrance awning, Horikita Suzune stood alone, her posture rigid with the precision of a clockwork soldier. A simple sun hat shaded her features, but it could not conceal the faint furrow between her brows.
She was calculating arrival times. She was also, though she would never admit it, anticipating.
"Oh—Horikita-san! You're here too!"
The voice was bright, casual, unburdened by the weight of unspoken tensions. Horikita turned.
Karuizawa Kei approached with her characteristic confident stride, her golden ponytail catching the light like a beacon. Beside her, Hirata Yousuke walked with his usual gentle composure, the class's emotional compass steady as ever.
"Karuizawa-san. Hirata-san." Horikita's nod was crisp, her tone cool but not unwelcoming. "Good morning."
"I didn't expect to run into you here," Karuizawa said, genuine curiosity in her eyes.
"The pool closes for maintenance after today." Horikita's explanation was matter-of-fact. "Additionally, I was invited."
Hirata's smile deepened, understanding. "It seems none of us wish to miss the final opportunity. Well, Kei and I will go ahead. Horikita-san, enjoy your time with your companion."
Karuizawa added a cheerful wave. "Have fun, Horikita-san!"
Horikita watched them disappear through the entrance. Karuizawa Kei—the de facto leader of Class D's female clique, possessing influence disproportionate to her academic standing. Hirata Yousuke—the class's unifying force, whose gentle exterior concealed formidable organizational capability.
Once, such figures had existed in a separate sphere from her own. Now, after the study group's success and her growing role in Sudo and the others' improvement, the boundaries had softened. Hirata, in particular, had made his recognition explicit. It was, she acknowledged, a necessary evolution in her integration into Class D's leadership structure.
Her thoughts were interrupted by another approaching group.
Leading the formation was Ayanokoji Kiyotaka, his face a placid lake reflecting nothing. Horikita's gaze lingered on him a beat longer than necessary. This man—her most frequent collaborator, her closest approximation to a confidant within the class—remained utterly opaque to her. His expressions never shifted. His true thoughts never surfaced. He was a perfect, unrippled surface, and she had long since stopped believing the depth beneath was empty.
Beside him walked Sakura Airi. The transformation was subtle but undeniable. Her eyes still darted away when meeting others' gazes, but she no longer flinched from contact. She was attempting conversation, attempting connection. Progress, measured in millimeters, but progress nonetheless.
And at the rear, radiant and immaculate, came Kushida Kikyo.
Her smile was its usual masterpiece—warm, inclusive, utterly flawless.
"Horikita-san~! Good morning!" Her voice was honey. "Have you been waiting long?"
"Not long, Kushida-san." Horikita's response was equally pleasant, equally measured.
The surface between them was calm. But beneath, the currents remained treacherous. The midterm "practice questions" of mysterious origin. Ayanokoji's oblique implications regarding Kushida's role in the rumor incident. Horikita no longer rejected Kushida's overtures with the visceral aversion of early term; she understood, intellectually, that maintaining cordial relations with the class's social nexus was strategically sound.
But the string in her chest remained taut. And she did not intend to let it slacken.
Kushida's gaze swept the assembled group, her brow tilting in practiced puzzlement. "Oh? Where are Yamauchi-san, Ike-san, and Sudo-kun? Aren't they with you?"
Ayanokoji's voice arrived with impeccable timing, flat as a weather report. "They are en route."
As if on cue, the unmistakable clamor of the idiot trio erupted from the direction of the pool.
"Hey—wait up!"
"Don't run, you'll make it worse!"
Yamauchi, Ike, and Sudo tumbled into view, a tangle of limbs and urgent excuses. Ike was panting, his complexion flushed. "S-slept in! Almost missed the deadline!"
Sakura Airi blinked, her voice small but precise. "But… if you slept in, why were you coming from the pool entrance?"
Three faces froze in synchronized panic. Three pairs of hands waved in frantic, identical denial.
"W-well, that's—!"
"Ahaha, nothing important!"
"Right! Let's just get in already! We're burning daylight!"
Horikita exhaled through her nose. She had neither the energy nor the inclination to decode their latest idiocy.
"Everyone is present. We should proceed."
She stepped forward, assuming the role of organizer with natural authority.
"Horikita-san! Ayanokoji-kun! Everyone from Class D—good morning!"
The voice was a sunburst, warm and impossible to ignore.
A second group approached from the opposite path. At its head, radiant and unshadowed, walked Ichinose Honami. Her pink hair drifted lazily in the summer breeze; her smile was unforced, genuine, undimmed by the recent ordeal that had sought to stain her reputation.
Behind her, the students of Class C moved with the easy cohesion of a team that trusted both its leader and itself.
Ichinose's eyes found Horikita's, and her smile deepened—not competitive, not performative. Simply friendly.
"Fancy meeting you here! Are you all here for the last swim of summer too?"
The morning light caught her features, illuminating them with the golden clarity of a new beginning.
The final day of vacation stretched ahead, open and unwritten. And on the concrete apron of the swimming pool, two classes that had recently been poised as adversaries now stood on the threshold of something else entirely.
What that something was, none of them could yet say.
"Ichinose-san. Good morning."
Horikita's response was measured, her mind already calibrating. Class C. Nine hundred and sixty-six points. A hair's breadth from Class B's 982, and the gap was narrowing with each passing week. The pink-haired girl at its center radiated a warmth that was not mere performance—it was genuine, infectious, and devastatingly effective at generating loyalty.
This was not merely a rival class. This was a rival philosophy.
"Are you all here for the final swim too? What a lovely coincidence!" Ichinose's smile was unguarded, her delight at the encounter clearly sincere.
Kushida slid seamlessly into the conversational gap. "Of course! With weather this perfect, how could we let the opportunity slip away?"
Horikita continued to observe Ichinose, but her thoughts had already drifted to another name. One that loomed over the entire first year like a geological formation—immovable, inescapable, impossible to ignore. Beside that presence, even the admirable competence of Ichinose Honami seemed to exist in a lower altitude.
The name surfaced in her consciousness.
And then, as if summoned by the mere act of thought, everyone turned.
It was not a conscious decision. It was a collective, involuntary response to a shift in the ambient field—a gravitational disturbance, subtle but absolute.
At the far edge of the concrete plaza, a black figure was approaching.
He was not running. He was not walking. He was skimming.
His legs moved at a frequency that defied biological limitation, a high-speed alternation that blurred the lower half of his body into a phantom afterimage. Each footstrike was a miracle of miniaturization—tap-tap-tap-tap-tap, a staccato rhythm like hailstones on tempered glass, so rapid and uniform that the individual impacts merged into a continuous, shimmering tone.
The concrete beneath him did not shake. It did not protest. Instead, a fine veil of dust lifted with each impossible step, coalescing into a trailing mist that followed his trajectory like the wake of a vessel on still water. He was not walking on solid ground. He was hydroplaning on particulate.
His upper body remained perfectly still. Upright. Composed. His posture was that of a gentleman on an evening stroll, utterly disconnected from the hurricane of motion occurring below his waist.
And his glasses—those signature black-rimmed lenses—caught the morning sun and fractured it into twin points of incandescent light, blinding and unreadable.
He arrived.
The transition from approach to presence was seamless, a jump cut in reality that left no space between "there" and "here." One moment he was at the distant threshold of perception; the next, he stood before them, the dust-wave settling at his feet in a gentle, dispersing sigh.
He bowed. The motion was fluid, precise, a perfect ninety-degree articulation at the waist.
"Good morning."
His voice was calm, unhurried. A greeting, not a performance.
"Horikita-san. Ayanokoji-kun. Sakura-san. Kushida-san. Ike-san. Yamauchi-san. Sudo-kun."
A pause. His gaze shifted.
"Ichinose-san. Kanzaki-san. Shiraha-san."
Every surname, accurately delivered. No hesitation. No error. As if he had simply—noted them, filed them, and retrieved them with the effortlessness of breathing.
"Are you all here to enjoy the final day of summer leisure? An excellent choice."
The sunlight continued its indifferent fall. The dust motes settled. The world, which had momentarily suspended itself to accommodate his arrival, resumed its ordinary rhythm.
But the atmosphere at the pool entrance had transformed. It was no longer simply a gathering of classmates, a coincidence of scheduling. It was now an occasion.
And at its center, serene and unknowable, stood the man who had turned a simple morning greeting into a ceremony.
Sakamoto adjusted his glasses. The lenses flashed once, twice.
"Shall we proceed?"