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Blue Box

Summary:

This IS a Blue Lock fic
On Valentine’s Day, Rin Itoshi keeps finding chocolates on his desk, in his locker, and everywhere he doesn’t want them to be. He returns every single confession.
After school, he escapes to the soccer field—only for Hiori Yo to find Rin there, alone, with the sky turning gold.
Somewhere between quiet passes and an awkward confession, Rin realizes his first love was never about the box—it was about who held it.

Notes:

soooo sorry if Rin is OOC or too soft!! His character is a bit hard for me to write, also english isnt my first language so please mind any mistakes, btw in this fic hiori and rin are enrolled in the same school soo enjoy reading!

Chapter 1: The blue box

Notes:

(See the end of the chapter for notes.)

Chapter Text

Rin Itoshi stared out the classroom window, chin resting against his palm.

The field beyond the school fence lay empty, the grass dulled by the afternoon light. The goal net shifted slightly as the wind passed through it, quiet and unbothered. Rin followed the movement with his eyes, counting the seconds between each sway. It was easier than paying attention to the noise behind him.

Break time was loud. Chairs scraped against the floor. Someone laughed too hard. Someone else complained about homework. Rin let it all blur together.

When the bell rang, the class slowly settled. Rin finally turned back toward his desk.

That was when he noticed it.

A small box sat neatly in the center of his desk.

Blue wrapping paper. Clean folds. No card. No name.

Rin blinked.

“…Tch.”

He scanned the room. A few girls sat stiffly at their desks, pretending very hard not to look at him. Someone near the window whispered something and was immediately shushed. Rin already knew what was inside the box without opening it.

Chocolate.

Valentine’s Day.

He picked it up, weighing it briefly in his hand, then slid it into his bag. He didn’t feel anything about it—no curiosity, no excitement. Just a familiar, dull exhaustion.

The teacher started speaking, and Rin leaned back in his chair, eyes drifting forward without thinking.

They landed on Hiori.

Hiori Yo sat a few rows ahead, posture relaxed, one leg hooked around the chair’s base. His pen spun slowly between his fingers as he listened, expression calm. The light from the window caught his eyes when he glanced sideways, and Rin felt himself pause.

They were soft. Round in a way Rin always thought of as owl-like—sharp when focused, gentle when relaxed. There was something quiet about the way Hiori looked at the world, like he was always observing rather than judging.

Rin swallowed and looked down at his desk.

Pretty, his mind supplied unhelpfully.

His jaw tightened.

“Rin Itoshi.”

Rin straightened. “—Yes?”

“You look far too relaxed for someone in my class,” the teacher said. “Since you’re clearly not listening, why don’t you translate the sentence on the board and explain the metaphor?”

A few students glanced over. Someone whispered, “He’s good at English, though.”

Rin stood anyway, movements stiff from being caught off guard. His eyes flicked to the board.

He read it once.

Answered immediately.

The explanation came out clean and precise, his pronunciation flawless, interpretation sharp enough that even the teacher paused.

“…That’s correct,” the teacher said after a moment. “Sit down.”

Rin sat back down, shoulders tense despite himself. He hadn’t struggled—not even for a second—but the sudden attention left his chest tight.

He kept his eyes forward.

Then he felt it.

A presence.

Rin glanced ahead and caught Hiori turning around in his seat.

Their eyes met.

Hiori smiled—small, warm, almost fond—before turning back to the board as if nothing had happened.

Rin’s expression didn’t change.

But warmth crept up his cheeks, and his heart beat faster, loud enough that he was sure it could be heard.


By lunchtime, Rin found another box under his desk.

He noticed it when his foot brushed against something that definitely hadn’t been there that morning. Rin paused, then leaned down, fingers closing around familiar smooth paper.

Another blue box.

He straightened slowly and stared at it for a moment before setting it on his desk. Still no note. Still no name.

“Again?” someone muttered from a nearby seat.

Rin ignored it. He slipped the box into his bag beside the first one, jaw tightening. He hadn’t opened either of them. There was no point.

When the lunch bell rang, the classroom emptied in a rush of voices and footsteps. Rin stayed behind just long enough to gather his things, then headed for the hallway.

He didn’t get far.

“Um—Itoshi?”

Rin stopped.

A girl stood a few steps away, clutching a small paper bag in both hands. Her shoulders were tense, eyes fixed on the floor.

“I just wanted to—” She inhaled sharply, then held the bag out to him. “Please accept this.”

Rin looked at it. Chocolate, again.

He accepted it reflexively, then hesitated.

“…Sorry,” he said, and held it back out. “I can’t.”

The girl froze, then nodded quickly, forcing a smile. “Right. I thought so.”

She took it and hurried away before he could say anything else.

Rin watched her go, guilt tugging briefly at his chest before fading into something duller. This always happened. He wasn’t cruel about it, but that didn’t make it hurt any less—for them, or for him.

He turned toward the stairwell—and nearly ran into someone.

“Oh—sorry,” Hiori said automatically, stepping back.

Rin stopped short. “No. It’s fine.”

They stood there for a second, awkward in the middle of the hallway as students streamed around them.

“Uh,” Hiori said, glancing at Rin’s bag. “Busy day?”

Rin followed his gaze, then looked away. “Something like that.”

Hiori hummed softly, a small sound of understanding. He didn’t ask more. He never did.

They walked together toward the cafeteria, steps falling into an easy rhythm. Hiori talked about a game he’d watched the night before, something about a strange formation and an unexpected goal. Rin listened, replying occasionally, grateful for the normalcy of it.

No chocolates. No confessions. Just conversation.

By the time lunch ended, Rin felt almost… lighter.

The feeling didn’t last.

In the afternoon, a neatly wrapped box appeared on his desk while he was in the restroom. Another one was pressed into his hands near the shoe lockers, accompanied by a rushed confession and a bowed head. Rin returned both, voice steady, expression neutral.

Each time, he felt eyes on him.

Not judging.

Watching.

When classes finally ended, Rin opened his locker.

Inside sat the last box.

He stared at it longer than the others.

Then he closed the locker door.

Around him, students laughed and talked excitedly about where they were going, who they were meeting. Dates. Cafés. Movies.

Rin shouldered his bag and walked past them all.

He didn’t go home.

His feet carried him somewhere quiet.

Somewhere familiar.

The soccer field.


Rin walked without really looking where he was going.

The noise of the school faded the farther he got from the gates—voices thinning out, laughter dissolving into the distance. He could still picture it, though. Groups splitting off in different directions. People calling out names. Promises made casually, like they were easy to keep.

Dates, he thought, without any real feeling attached to the word.

His bag felt heavier than usual against his shoulder. Not because of the chocolates themselves, but because of what they represented. Expectations. Feelings he didn’t return. Things people wanted from him that he didn’t know how to give.

He hadn’t even opened a single box.

Rin wondered, briefly, if that made him ungrateful.

Then he dismissed the thought.

He hadn’t asked for any of it.

The path to the field was worn, familiar beneath his shoes. He’d walked it countless times—after practice, after losses, after days when staying still felt unbearable. The fence came into view, metal catching the late afternoon light.

He slowed.

For a moment, he thought about turning back. Going home. Locking his door. Letting the day end quietly.

But his feet kept moving.

His mind, unhelpfully, drifted back to the classroom.

Blue wrapping paper.

A soft smile over a shoulder.

Owl-like eyes catching the light.

Rin frowned slightly, annoyed at himself.

Why him?

It didn’t make sense. Hiori hadn’t done anything. He hadn’t confessed, hadn’t given chocolate, hadn’t even looked particularly upset. If anything, he’d been the same as always—gentle, observant, quietly present.

Maybe that was the problem.

Rin had spent the entire day being noticed.

And yet the only person he’d kept looking for hadn’t tried to claim his attention at all.

The thought made his chest feel tight, unfamiliar pressure building just under his ribs. Rin stopped just outside the field gate, fingers curling briefly around the strap of his bag.

He exhaled slowly.

The field lay ahead, washed in gold. Empty. Silent.

Exactly how he liked it.

Rin stopped just outside the field gate.

For a moment, he stood there, fingers tight around the strap of his bag. The weight dragged at his shoulder, grounding him in everything he’d spent the day avoiding.

With a quiet click, he let it fall to the ground.

The sound echoed softly in the empty space.

Rin stepped onto the field and nudged a ball toward himself with the side of his foot. The familiar texture steadied him immediately. He rolled it once, twice—then flicked it up without thinking.

The ball rose cleanly into the air.

Rin moved.

Foot under the ball. A quick lift. Another. The rhythm came back to him instantly, body taking over where his thoughts failed. He kept it up with practiced ease, taps light and precise, eyes following its arc against the fading blue sky.

Up. Down. Control. Release.

His breathing evened out.

For the first time all day, his mind went quiet.

No boxes. No confessions. No expectations.

Just movement.

He trapped the ball against his thigh, flicked it back up, spun slightly to keep it from drifting away. The grass brushed against his shoes as he adjusted, losing himself in the simple freedom of it.

And yet—

Even like this, something lingered.

Between one touch and the next, his thoughts slipped where he didn’t want them to.

A soft smile.

The way Hiori had looked back at him without saying anything.

Rin clicked his tongue under his breath and sent the ball higher than before, catching it easily when it came back down.

“Focus,” he muttered, to himself this time.

The ball obeyed him.

His heart, unfortunately, didn’t.

The ball slipped.

Rin realized it half a second too late.

His foot caught it wrong, the rhythm breaking, and the ball bounced away from him, rolling across the grass toward the edge of the field.

“…Tch.”

He jogged after it, reaching down to stop it with the sole of his shoe—

“Whoa—!”

Rin froze.

The ball stopped inches from someone else’s foot.

Rin looked up.

Hiori stood there, hands halfway raised like he wasn’t sure whether to catch the ball or apologize for existing. His eyes were wide, startled, the sunlight catching in them just like it had in class.

“O—sorry,” Hiori said quickly, nudging the ball back toward Rin with an awkward tap. “I didn’t mean to interrupt.”

Rin straightened too fast. “You didn’t.”

Silence.

The kind that stretched.

Hiori shifted his weight, glancing around the empty field. “Uh… I didn’t think anyone else would be here.”

Rin nodded once. “Same.”

Another pause.

The late afternoon breeze passed between them, rustling the grass, carrying the faint sounds of the city beyond the fence. Rin was suddenly very aware of how close Hiori was. Too close. Close enough that he could see the faint crease at the corner of Hiori’s eyes when he smiled.

Which he did.

Small. Nervous.

“…You’re really good,” Hiori said, gesturing vaguely at the ball. “I mean, I know that’s obvious, but—yeah.”

Rin felt heat creep up his neck. “It’s just habit.”

“Still,” Hiori replied. “It looked… free.”

The word hit harder than Rin expected.

He looked away and trapped the ball under his foot. “You here to practice?”

Hiori hesitated. “I was. But I thought everyone would be busy.”

Rin understood immediately.

Valentine’s Day.

“Yeah,” he said. “Looks like it’s just us.”

Hiori laughed softly, rubbing the back of his neck. “Guess so.”

They stood there, neither moving, neither leaving.

Rin nudged the ball toward Hiori without thinking.

“Pass,” he said.

Hiori blinked—then smiled properly this time. “Okay.”

He kicked it back.

The ball rolled cleanly between them.

And just like that, the awkwardness didn’t disappear—But it softened.

They didn’t talk much.

They didn’t need to.

The silence between them wasn’t heavy or awkward—it was familiar, like something they’d shared without ever naming it. The sound of the ball moving across the grass, the soft thud of passes, the steady rhythm of their breathing filled the space easily.

Rin passed the ball harder than necessary at first—sharp, precise, like he was trying to anchor himself in the motion. Hiori caught it cleanly, adjusted, sent it back with just enough curve to keep Rin moving.

Back and forth.

The rhythm settled quickly.

Rin moved on instinct, feet light against the grass, body responding before his thoughts could interfere. Traps, turns, quick flicks of the ankle. Hiori kept up easily, passes smooth, timing careful. He didn’t crowd Rin, didn’t hesitate either—like he knew exactly how much space to give.

Rin noticed.

He always did.

They started moving more, covering ground without discussing it. Rin sprinted down the field; Hiori sent a long pass that landed perfectly ahead of him. Rin stopped it with his foot, turned, and sent it back without looking.

It reached Hiori anyway.

“…Nice,” Hiori said, breath a little uneven.

Rin shrugged. “You’re accurate.”

Hiori smiled faintly at that and didn’t reply.

They practiced shooting next. Rin took the first few shots, the sound of the ball hitting the net echoing across the empty field. Hiori retrieved it each time, jogging back, hair catching the light as he moved.

Then Hiori lined up his own shot.

Rin watched closely.

The kick wasn’t powerful, but it was clean. Thoughtful. The ball slid into the corner of the goal like it had always meant to go there.

Rin felt something twist in his chest.

“…You’re improving,” he said.

Hiori glanced back, surprised. “You think so?”

Rin nodded once. “Yeah.”

Hiori ducked his head, smiling to himself as he jogged back. “That means a lot, coming from you.”

They kept going until Rin lost track of time.

Sweat clung to his skin, lungs burning pleasantly, muscles loose in a way that felt earned. When they finally stopped, Rin bent forward slightly, hands on his knees, breathing steady.


Hiori dropped onto the grass nearby, stretching his legs out in front of him.

Rin stayed standing for a moment longer, chest rising and falling as he caught his breath. Eventually, he sat down too, a short distance away—close enough to share the same patch of shade, far enough that neither of them brushed against the other.

The grass was cool beneath his palms.

For a while, neither of them spoke.

The silence settled easily between them, unforced and familiar. It wasn’t empty. It was filled with the distant sounds of the city, the faint rustle of the wind through the field, the quiet proof that they were both still there.

Hiori leaned back on his hands, tilting his head toward the sky. “Everyone really did ditch,” he said lightly. “Guess today’s important to a lot of people.”

Rin followed his gaze. The sky had begun to deepen in color, blue melting slowly into gold.

“Yeah,” he said. “Figures.”

Hiori hummed, like he agreed but didn’t feel strongly enough about it to argue. His shoulder brushed the grass when he shifted, movements relaxed, unguarded.

Rin noticed how at ease he looked.

He always did.

Rin sat back on the grass, knees drawn up slightly, eyes lifting toward the open stretch of the field ahead. The quiet wrapped around them easily, familiar in a way that loosened something in his chest.

Hiori shifted beside him, sitting cross-legged, close enough that Rin could feel the warmth at his side.

“You went quiet,” he said, not accusing—just noticing.

Rin blinked, startled by how easily he’d been read.

“…Yeah,” he admitted.

Hiori didn’t ask why. He never did. He only hummed softly, accepting the answer the way he accepted most things—without needing to hold onto them.

“I like it here,” Hiori said after a moment. “When it’s like this.”

Rin’s fingers brushed against the grass, grounding himself.

“Mm,” he replied, quieter now. “Me too.”

The silence that followed wasn’t empty. It settled between them, slow and warm, carrying something unspoken beneath it.
Rin became aware of his heartbeat then—steady, insistent—like it was counting down to something he couldn’t keep avoiding.

He glanced sideways.

Hiori was still looking at the sky, expression calm, unaware—or maybe aware, but waiting.

Rin swallowed.

His chest felt tight, full in a way he didn’t have a word for yet.


Rin kept staring.

He told himself he wasn’t—but his eyes stayed fixed anyway, tracing the soft line of Hiori’s profile as he lay back against the grass. The late light caught in his hair, brushed over his lashes, settled in his eyes when he blinked.

Owl-like, Rin thought again.

Quiet. Gentle. Too pretty for someone who didn’t even seem aware of it.

The thought pressed too hard against his chest.

And before he could stop himself—

“God,” Rin muttered, voice low and rough, “why are you so damn pretty?”

Silence.

Rin froze.

Hiori turned his head slowly. “—Huh?”

The world caught up to Rin all at once.

I said that out loud.

Heat rushed to his face so fast it made his ears burn. Rin looked away sharply, jaw tightening, fingers digging into the grass like he could anchor himself there. His cheeks felt hot—too hot—and he knew there was no hiding it.

Lukewarm.

He swallowed, heart pounding hard enough that it drowned out everything else.

Well, his mind supplied bitterly, there’s no backing out of this now.

Rin straightened slightly, still not looking at Hiori.

“…I meant it,” he said.

Hiori didn’t interrupt. Didn’t laugh. Didn’t brush it off.

That made it worse.

Rin exhaled slowly, forcing the words out before he could lose his nerve.

“I like you,” he said, blunt and honest and terrifying all at once. “Not like the others. Not like—” He stopped, frustrated. “I kept thinking about you all day.”

He finally looked over.

Hiori was staring at him, eyes wide—not shocked, just stunned. Like he’d been handed something fragile and didn’t know where to put it.

Rin’s ears burned hotter.

“I didn’t plan to say it like that,” he added stiffly. “But it’s true.”

His heart hammered in his chest.

There was no taking it back now.

Hiori didn’t speak right away.

For a second, Rin wondered if he’d said too much—if he’d broken something fragile without realizing it. He opened his mouth to say something, anything, just to fill the silence—

Then he noticed Hiori’s hands trembling slightly where they rested in the grass.

“Hiori…?” Rin said, unsure.

Hiori laughed softly, breath hitching halfway through. He brought one hand up to his face, rubbing at his eyes like he didn’t quite believe what was happening.

“Sorry,” he murmured. “I’m—sorry, I just—”

When he looked back at Rin, his eyes were shining.

Not with shock.

With something warmer. Fuller.

“I thought I imagined it,” Hiori said quietly. “All day, I kept thinking I was reading into things that weren’t there.” He smiled, small and unsteady. “I didn’t want to hope. Because if I did, and I was wrong…”

His voice wavered.

Rin’s chest tightened.

“So I told myself it was fine,” Hiori continued. “That liking you quietly was enough.”

A tear slipped free despite his attempt to blink it away. He laughed again, embarrassed, pressing his sleeve to his eyes.

“I’m really bad at this, huh?”

Rin shook his head immediately. “No.”

Hiori looked at him, surprised.

“I like you too,” Hiori said then—soft, certain, like he’d finally allowed himself to say it. “I have for a while.”

The words landed gently, but they hit Rin harder than anything else that day.

Hiori’s smile wobbled as another tear fell, this one he didn’t bother to hide.

“I’m just… really happy,” he admitted. “That you noticed me.”

Rin stared at him, heart pounding, something warm spreading through his chest that felt dangerously close to relief.

“…Idiot,” Rin muttered, but there was no bite to it at all.

Hiori laughed, eyes still wet. “Yeah. Maybe.”

They sat there like that—no rush, no movement—just the quiet understanding settling between them, deeper than the silence they’d shared before.

Different now.
Better.

Hiori wiped at his eyes, still smiling, and reached into his bag.

“For the record,” he said softly, a little embarrassed, “I did have one.”

Rin blinked. “What?”

Hiori held out a small box.

Blue. Neatly wrapped. Slightly worn at the edges, like it had been carried around all day.

“I was going to give it to you,” Hiori admitted, voice barely above a whisper. “If I was brave enough.”

Rin stared at it.

Then he took it.

Their fingers brushed.

The box was warm from being held.

Blue box.

Notes:

Stay tuned for the next chapter which will be.. dun dun dun dun..!! their first date!! i hope you readers enjoyed this whole thing i wrote for valentines even though its already been like 3 days.. shhh no one talk about that, okay the truth is i got so happy seeing rin shout hioris name in the newest chapter leak so i wrote this out of excitement.. okay thats all!! Thank you for reading.