Prologue: Spring’s First Bell
It’s Monday morning. The windows flash with the pale spring sun. Students spill into Class 2-B, claiming seats and trading snippy jokes. At the heart of it all stands Yu Harada—a curt, fiercely-smart girl with sun-cut hair who won last year’s test battle by barely a point. She sits by the left window, her sunlight spot now famous across the halls. She flips her blue notebook shut. “First year was fun, but… can you really call it a win when it was by luck?” she mutters.
The door slams. Minoru Kijima enters late as always, hair wild, tie loose. His trademark copybook dangles from his teeth. The seat beside Yu stands empty. He lingers, grinning. “Ready for season two, Harada? This time you won’t slide through with brainwork alone—I’m going to aim for your spot AND your scores.”
Act 1: Seat Stakes
Have you ever fought for a classroom seat? Seems silly, maybe. But here, the sun-window held power. The best place to think or nap or be seen. The challenge is public: highest total grades by the third round, winner gets the spot—and the loser yields it for good. Snap, just like that, friendships tilt. “What’s gotten into you two this time?” asks Mitsu, their shy friend, who picks her desk in the back.
The teacher, Mrs. Enumoto, smiles with closed eyes. “Guess it’s another Rival Seat war, huh? Let’s hope you all keep things honest!” But you can sense it—a thin edge hides under her tone. She’s seen things get ugly here: whispered answer swaps, midnight plotting. Kijima and Harada agree to terms, all written simple: Three weeks to the first test duel, winner takes the window, loser must work from the corner.
<img src="
“>
Act 2: Silver Calculators, Blue Fears
Kijima starts off grinning wide. He brings homemade flash cards, leads science clubs outside, swaps trivia with classmates early. Why is so much on the line, you ask? At Sunbokku High, seats mean reputation. Smart kids chase sun spots. That’s just how it is.
Harada pushes back quietly. She studies alone after class, making quick, sharp notes. She relishes the rush, sure—but something itches her. Rivalry makes school less gray, but she fears what she becomes during these contests. “Minoru’s loud but honest,” she whispers to herself one afternoon. “If he gets my seat, will people start choosing him instead—even my old friends? They say all’s fair, but I still want fair to look good.”
Calculator tips fly. Even classmates pick sides, some out of luck, some truly moved. Will Sun-Desk keep drawing eyes? 
Act 3: Plotting in the Quiet
There’s always someone who can’t handle second place. Rika, stuck in the shadows behind the door, skims both scoreboards and bristles. “Take those smug faces down,” she says one break. Rumors swirl: someone’s swapping test cover sheets. At lunch, Rika slips a glue stick behind Minoru’s pencil box. Guess what? Later, his answer sheet comes up stuck, torn, just as he tries handing it in.
Mitsu, the quiet observer in the corner, sees odd movements and writes it down. Should she say something? Would anyone trust her if she spoke out? What’s right when rules feel weird, are you sure anyone would believe it’s more than a seat at stake?
That day, Minoru narrowly avoids a failed score, running in at the buzzer with crumpled pages. He shoots Harada a glare. “You plan that, huh?” People start to pick sides fast after that.
Act 4: Friends on Board, Truth Awry
Yu finds herself cornered at lunch by angry classmates. They demand she confess to foul play. Bet you’ve been blamed when you just want to win, right? Her hands shake, but she stands up. Mitsu steps between, voice thin but sure. “Yu never touched his stuff.” Proof comes out: a class log, tiny but clear.
This pulls everyone up short. Rika slides down, red-faced, muttering as she packs her bag. The teacher, drawn by raised voices, looks on. “Rivalries help you grow, but trust gets broken fast. Watch where you step.” But it hangs in the air—was Yu really blameless, or just lucky?
Act 5: The Big Test
Sheets crackle. Minoru hums, focused. Yu works flat out, biting her pen. Above, sun warms the tip of her desk, almost too much to bear. Mitsu finishes early, glances over to see both look worn out. The school clock ticks. Grades flash up after school: It’s a tie. They freeze. It’s not possible, everyone says, it’s unheard of—but there it is, perfect symmetry.
The teacher smiles, bemused. “What next? Flip a coin to decide?” No. Yu jumps to her feet. “Rematch. A real public quiz—no notes, no study time, the whole class watching. Winner takes the window—maybe for good.” 
Cliffhanger: Shadows in Dust, Sunlight on Glass
People gossip as teams gather. Everything rides on this open challenge. Old questions sting sharper now: what if Kijima cracks under all those eyes? Can Yu win under open daylight? What about Mitsu, keeping silent truth till the end? You ever try to live up to everyone’s hopes and not just your own? Why are classroom stakes bigger than they should be?
As a streak of cloud cuts the sunbeam in half, Yu stands alone, hand on glass, sweating before the class. Minoru steps up next to her, calm. Both ready—friendship on the line, pride dangling. The last words heard: “This time, don’t blink.” Then the screen fades, clock ticking down.
