Mina Asakura isn’t the person others think she is. She’s the best in her year at Onigiri High, always top of the class, soft-spoken. No one pays strong mind to the way she walks always a little to the left of the center hall. She chases boredom out of fear her mind might wander, mostly reading the same old books and listening in class. Does she like her life this way? Mina fears the past, though it’s buried under months of plain days. That’s her first secret.
One gray rainy afternoon sets everything in motion. The PA squeals. “Due to the rain, stay indoors after last bell,” intones Vice Principal Ohta, dry as paper. Mina packs quick, ready to run home. A sound stops her – soft voices, echoing from the old third-floor storeroom as she walks by. Nobody uses it anymore. Curiosity wins, as it always does when the weather has no sun. Can you recall a moment where a tiny choice changed your whole year?
Mina presses her ear close. On the far side: Yuta Takano’s voice, urgent, low. She can’t see him, but everyone knows his laugh and the trinkets he hocks behind the gym. Rumor puts Yuta just this side of trouble. Two others are with him. Junpei, whose grades never count, and shy Kayo, who trembles rather than speaks. Mina slips closer, face prickling. She’s good with codes, patterns. Music helps. So, the whispers get pieced together: they’re planning something big, or maybe desperate.
This mystery eats at her all night. In another life, she’d turn away–but math class the next day means a passing Yuta, eyeing her just brief and gone. That look. It’s not even a warning, just empty. Does he know already?
When Kayo, hiding behind a locker, slides her a note at noon, things can’t go back to normal. “Help me,” it starts. The edges are damp. She writes an answer, just a simple yes, and Kayo leads her to the track’s edge after last class. “Yuta’s playing with the lockbox, he thinks it holds something hidden by Mizuki August last year. We shouldn’t… but he can open anything! If he does–everyone could get hurt.” Mina bits her tongue. Risk is strong here, stronger than the rain. Mina agrees to break in and see for herself.
It turns out people rarely guard secrets for good reasons. They sneak in at night, lit by phone screens. The lockbox isn’t steel, just old wood with numbers. Doesn’t that make it worse? Yuta holds the box, grin spotlighted, code worked loose in under five tries. Mina, watching, mouth dry, finds a rolled math test and a small, cracked SD card–like you’d get in a digital camera, ten years back.
She snatches the card, fast, when a creak from the hall chills more than the rain. Panic fixes everyone in place. Then, footsteps. Grown-up shoes. Vice Principal Ohta is making his way down, each step even and counted. Mina hisses, “Hide.” Junpei’s big palm over her mouth, bodies curled under gym mats, dust urging coughs. It’s the kind of dread you taste as tin on your tongue.
Mina hears not her name, but Ohta quietly saying, “Next year, I won’t need to check anymore. Secrets lose their shine fast.” His hand glides along trophy cases. They hardly breathe until slow steps die away.
After, they run together. At a bus stop, Mina checks the SD on her ancient phone. Small icons: video, cryptic files marked “BOYO.” She glances at Kayo. “Did you know?” Kayo shakes her head, cheeks wet, but not from rain. “I’m scared.”
Video loads. It’s the former top student, Mizuki, younger, pale, with Ohta and—Mina gasps—her own sister, Hina, gone from school a year back without a word. Mina’s secret turns cold as moonlight. Yuta says, almost gently, “You don’t need this, Mina. Let someone else dig. Drop it in the canal, okay?” But that’s not her way. She presses play. A flurry of code titles flickers across the screen. They’re the school’s grades, stolen and rewritten year after year, powers kept between a handful of staff, the faves.
Now they all hold proof. But it’s just as scary as having nothing at all. A bus whines by, doors sighing, as if even machines knew something is off tonight. Mina’s heart stammers. “How much will we lose?” she asks the others.
Nobody answers. The arc closes on the black glow of her phone, the video bubbling with hidden names as lightning touches the ground outside. Would you watch the rest of that video, knowing it could burn what you love most?
Yuta shrugs, looking less sure than ever. “Guess we’re all in now, right?” Junpei nods silent, face honest for once. Mina clenches the phone close. Thunder rolls again. More secrets are coming. That’s the only answer she gets before the episode fades out on rain still drumming on wild grass.
Cliffhanger: Waking from little sleep the next morning, Mina finds a single envelope slipped under her door. No sender, no stamp, only her name tight-written in blue ink she knows at once–Hina’s. Inside, one sentence: “Meet me, under the clock, don’t bring anyone.”
