Chapter Text
Kaito’s quirk manifests on an afternoon that is otherwise unremarkable.
There is no lightning, no scream, no sudden catastrophe to give the moment weight. Later, people will look back and try to assign meaning to it- to find the exact second everything went wrong- but at the time, it feels like nothing more than a quiet mistake.
He is six years old, sitting cross-legged on the living room floor, assembling a puzzle that is missing two pieces. The TV hums softly in the background, a cooking show his mother likes because it fills the house without demanding attention. Outside, a train passes every twelve minutes, close enough to make the windows tremble.
Kaito doesn’t notice any of that.
He is focused on the puzzle, on the shape of absence, on how some things are defined more by what isn’t there.
His mother is on the phone in the kitchen. Her voice is tight, threaded with exhaustion he has learned not to ask about.
“No, I said Thursday- no, I can’t move it again,” she says. “Because I’ve already- yes, I understand, but- ”
Her words begin to overlap in Kaito’s head. Not loudly. Just enough to irritate, like a pebble in a shoe. He presses his lips together and exhales through his nose, a habit he picked up in school when classrooms got too bright and too busy.
The air changes.
It’s subtle. Even later, when specialists try to identify the precise mechanics of his quirk, no one can pinpoint what happens first. There is no visible mist, no scent. Just a shift- like the moment before sleep when thoughts begin to loosen their grip.
In the kitchen, his mother stops speaking mid- sentence.
There is a pause on the line. Someone says her name.
“Kaito?” she calls, slowly, as if testing the word.
He looks up, startled. “Yeah?”
She blinks, phone still at her ear, her expression briefly unfocused. When she speaks again, her voice is softer.
“It’s fine,” she says into the phone. “Thursday is fine. I’ll make it work.”
She hangs up without waiting for a response.
Kaito watches her carefully. “Did I do something wrong?”
She smiles automatically. “No, sweetheart. I just… needed a moment.”
She kneels beside him, smoothing his hair back from his forehead. Her hand lingers longer than usual. Her shoulders drop, tension melting out of her frame in a way that makes something twist uncomfortably in his chest.
“That was nice,” she murmurs, almost to herself.
“What was?” Kaito asks.
She straightens, the moment gone. “Nothing.”
But the house feels different now.
Quieter.
-
At first, the quiet feels like a relief.
Kaito has always been sensitive- to noise, to crowds, to the way emotions seem to leak out of people whether they want them to or not. School is loud in a way that makes his teeth ache. His classmates move too fast, talk too much, change the rules of games without warning.
The quiet, when it happens again, feels like order.
It happens a week later in class.
A boy two rows over is crying. Not loudly- just the tight, embarrassed kind of crying that adults pretend not to notice. The teacher keeps talking, voice strained, trying to maintain momentum.
Kaito feels the familiar irritation rise, sharp and prickly. He breathes out, slow and controlled, the way his mother taught him when he got overwhelmed.
The crying stops.
Not abruptly. It fades, like someone turning down a dial.
The boy wipes his face, blinking, confusion replacing distress. The classroom settles. Even the teacher seems relieved, her voice smoothing out as she continues the lesson.
Kaito’s pencil slips from his fingers.
He doesn’t understand what he’s done, but he understands the result.
Later, during recess, the boy sits beside him on the swings without being asked.
“I feel better now,” he says matter- of- factly, kicking at the dirt. “Thanks.”
Kaito’s stomach twists. “I didn’t do anything.”
The boy shrugs. “Still.”
They sit in silence, swinging gently. The moment stretches too long, heavy with something Kaito doesn’t have a name for yet.
-
The adults notice before he does.
They notice the way arguments dissolve when Kaito enters a room. The way children stop fidgeting when he sits nearby. The way teachers feel inexplicably calmer after parent- teacher meetings that include him waiting quietly in the corner.
At first, they praise him.
“He’s so well-behaved,” they say.
“He’s mature for his age.”
“He has such a calming presence.”
The words make Kaito uncomfortable. They feel like expectations he doesn’t remember agreeing to.
The first meeting with a quirk specialist happens three months later.
The office smells like antiseptic and lemon cleaner. Kaito sits on a chair that’s too tall for him, feet swinging, while adults talk over his head.
“It’s an emitter-type,” the specialist says, tapping notes into a tablet. “Airborne. Subtle. Potentially dangerous if left unmanaged.”
His mother’s hand tightens around his shoulder. “Dangerous how?”
The specialist hesitates. “Influence. Cognitive dampening. Hypnotic effects, possibly.”
Kaito frowns. “I don’t make people do things.”
“No,” the specialist agrees quickly. “Not intentionally.”
That word sticks with him.
Intentionally.
-
They install air purifiers at home.
They start opening windows even in winter.
Kaito is asked- gently, carefully- to sit farther away during family gatherings. To take breaks when things get “too emotional.” To stop humming when he’s anxious.
He tries.
But the quiet keeps happening.
It happens when his father comes home late, shoulders tight with unspoken anger. Kaito breathes, and the anger dulls into something manageable. His father sinks into a chair, rubbing his face.
“Sorry,” he mutters. “Long day.”
It happens when his cousin has a panic attack during a birthday party. Kaito sits beside her, says nothing, just breathes. She slumps against him, eyes half- closed.
“I wish I could feel like this all the time,” she whispers.
Kaito doesn’t know what to say.
He starts to notice the pattern then.
People don’t just calm down.
They let go.
Of worry. Of resistance. Of choice.
And the worst part- the part that makes his hands shake when he thinks about it- is that they seem grateful.
-
The first time someone asks him outright, he’s eight.
It’s a girl from his class, sitting beside him on the bus ride home. She’s small and sharp- tongued, usually restless, always talking. Today she’s quiet, knees drawn up to her chest.
“My mom’s sick,” she says abruptly. “I don’t like how it feels.”
Kaito nods, unsure.
“You do that thing,” she continues. “When everything gets slow.”
“I’m not supposed to,” he says immediately. The words come out rehearsed.
She looks at him, eyes tired in a way he’s learned to recognize. “Just for a minute.”
The bus rattles over uneven pavement. Outside, the city blurs past.
Kaito hesitates.
Then he exhales.
The effect is immediate. The girl’s shoulders drop. Her breathing evens out. She leans sideways, resting her head against the window.
“Oh,” she murmurs. “That’s nice.”
Kaito’s heart pounds painfully in his chest.
He spends the rest of the ride staring at his hands, terrified to breathe again.
That night, he lies awake replaying the moment over and over. The relief on her face. The way the noise inside him quieted too.
He thinks, distantly, that this must be how power starts.
Not with wanting to control.
But with wanting the quiet to stay.
-
By the time he turns nine, Kaito has learned something important:
People don’t want to be told what to do.
They want permission to stop deciding.
And every time he notices that truth, something inside him tightens- equal parts fear and recognition.
He doesn’t tell anyone.
He doesn’t know how.
The house is quiet more often now.
And somewhere in that growing stillness, Kaito begins to understand that this- this- is something he will never be allowed to want.