Aizawa fanfiction following Jessaline Shimizu’s return to UA High, where old wounds, unfinished love, and looming threats resurface fifteen years later.
Fifteen years after leaving Japan, Jessaline Shimizu returns to UA High carrying a past she never truly escaped. The country feels unchanged, yet everything inside her has shifted. Old friendships welcome her back with familiar warmth and chaos, but not all reunions are so kind.
Read the Prologue here if you missed it.
Chapter 1: When an Old Ghost Looks Back at Her
Fifteen Years Later**
Jessaline Shimizu steps off the plane and stops dead in the middle of Narita Airport.
Japan feels exactly the same.
And nothing like she remembers.
The air even smells familiar. Clean, crisp, tinged with sea-salt from the distant bay. It hits her hard, right behind the ribs.
Fifteen years.
Fifteen years since she ran from this country.
Fifteen years since she last stood in the place where everything broke.
Her fingers tighten around her suitcase handle. She draws in a slow breath and whispers to herself.
“Alright, Jessa. You can do this.”
Her voice wavers. So she does what she always does. She smiles.
She spots a familiar flash of violet hair barreling through the crowd.
“JESSA.”
Nemuri Kayama slams into her without warning, scooping her into a dramatic hug that nearly lifts her off her feet.
“You are here. You are actually here. Do you have any idea how long I have waited for this moment”
Jessa laughs, breathless. “At least warn me next time.”
“Never,” Nemuri says, squeezing harder. “You look good. Older, but in a hot older way. United States suits you.”
“As opposed to what. A sad older way”
Nemuri gasps. “I would never. Well. Maybe if you had shown up wearing cargo shorts.”
Jessa groans. “I wore those once.”
“And we never let you forget it.”
A loud voice erupts from behind them.
“GUESS WHO FOUND THE RIGHT TERMINAL.”
Jessa barely has time to brace before Hizashi Yamada throws his arms wide and rushes toward her like an enthusiastic golden retriever.
“JESSA SHIMIZU RETURNS. I CANNOT BELIEVE IT. THIS IS ICONIC.”
Several travelers flinch at the volume.
Nemuri smacks his arm. “Indoor voice.”
“That was my indoor voice.”
“It really was,” Jessa agrees, laughing.
Hizashi beams. “See. She understands me.”
She hugs him warmly. “I missed you, Hizashi.”
“We missed you too,” he says with genuine softness before instantly ruining the moment. “Also I told Nemuri you would cry when you saw us but she said you would be too dehydrated from the flight.”
Nemuri taps her chin thoughtfully. “I was wrong. She looks very hydrated.”
Jessa gives them both a long look. “I forgot how chaotic you two are.”
“No you did not,” Nemuri says, linking their arms. “Now come on. The car is illegally parked.”
“Since when do you follow parking laws” Jessa asks.
“Since never,” Nemuri answers proudly.
The Car Ride: Chaos Reborn
The moment they get into the UA staff vehicle, Hizashi immediately takes control of the stereo.
This is a mistake.
Pop music pulses through the speakers at a volume that rattles Jessa’s bones.
Nemuri slams her hand onto the dashboard. “Turn it down. She just got off a thirteen hour flight.”
Hizashi lowers it by exactly one notch. “Better”
“No,” Nemuri says.
Jessa laughs. “It is fine. I missed this.”
Hizashi twists in his seat to face her. “So. Are you ready to teach Japan’s future heroes again. America must have been wild. Were the kids still brats. Are your coworkers boring. Did anyone confess undying love to you.”
Nemuri flicks Hizashi in the forehead. “We are not interrogating her about her dating life on the highway.”
Jessa raises her hands. “Please do not. My love life is tragic.”
“Perfect,” Nemuri whispers.
Jessa smiles softly out the window. The scenery blurs by. Buildings. Trees. The Tokyo skyline far ahead.
She feels her pulse spike.
UA is close.
Too close.
Her stomach twists as the gate comes into view. And when they pull into the parking area, her heart slams painfully against her chest.
This is happening.
She is really back.
Return to UA
All Might waits at the entrance, towering, smiling in that warm way that used to make her feel safe as a student.
“Shimizu,” he greets kindly. “It is good to have you with us again.”
She bows politely. “Thank you for inviting me. It is an honor.”
“You will be teaching Rescue Tactics and Environmental Response,” All Might says. “And assisting in Combat Training when needed. The staff is excited to have you.”
Some teachers passing by wave. More than one murmurs, “Is that the prodigy exchange student Yes, the one who became a top five pro in America.”
Jessa feels heat rise in her cheeks. “I am not a prodigy. I was just stubborn.”
Nemuri smirks. “It is your main personality trait.”
Hizashi nods. “Deeply stubborn. In a heroic way.”
Jessa laughs awkwardly. “Well. Thank you. I am excited to be here.”
She is not excited for what comes next.
The Staff Room
The door slides open and the familiar smell of ink, coffee, and old books hits her immediately.
Nemuri enters first, chatting with a teacher Jessa does not recognize. Hizashi wanders in behind her, humming loudly.
Jessa steps inside.
Her eyes flicker over the room.
Teachers. Desks. Papers. Familiar posters.
Then she sees him.
Aizawa Shota stands near the back wall, sorting through a stack of files. His hair is tied loosely, falling over one shoulder. He wears his usual black outfit, tired eyes calm and unreadable.
For a moment Jessa forgets how to breathe.
He looks up.
For a second, everything stops.
His expression is neutral. Very neutral. Too neutral. His posture stiffens only slightly, but she notices every millimeter.
Nemuri raises her brows like she has been waiting for this.
Hizashi’s grin stretches wide. “LOOK WHO IS BACK.”
Jessa swallows carefully and forces a polite smile.
“Hello, Shota.”
His reply is delayed by a fraction of a second. “Shimizu.”
Formal.
Cold.
A stranger’s greeting.
Jessa nods once. “It is good to see you.”
He gives a barely perceptible bow of his head in response. “Welcome back.”
Nothing more.
Hizashi’s face falls a little.
Nemuri winces.
Jessa’s chest tightens.
Right.
So he still hates her.
She turns her attention back to All Might as he continues the meeting, but her pulse thrums in her ears.
Across the room, Shota keeps his eyes fixed firmly on his paperwork.
His thoughts are sharp. Controlled. He repeats them like a mantra.
She is here.
Stay professional.
Do not let this happen again.
Meeting With All Might
After the awkward staff introduction, All Might catches her eye with a small nod. Jessa knows that look. It is the same look he used to give her as a teenager whenever a conversation needed privacy and honesty.
“Shimizu,” he says gently. “A moment, please.”
“Of course.”
Nemuri squeezes her shoulder in silent support. Hizashi salutes dramatically. Jessa rolls her eyes fondly and follows All Might down the hallway, heart still pounding from the cold greeting she received from Shota.
They enter a quiet conference room. The door slides shut, cutting off the noise from the rest of the building. All Might sits with a slow exhale and shifts into his true, thin form. His eyes soften with something almost fatherly.
“You handled that well,” he says. “Even the difficult part.”
Jessa stares at her hands. “He barely acknowledged me.”
“He is not angry with you,” All Might says. “He is angry with himself. That is a very different thing.”
She forces a smile. “I do not think he sees it that way.”
“He will. Eventually.”
She doubts it, but she lets the lie rest. All Might leans forward, lacing his fingers.
“Now. You know why I called you here.”
She nods slowly. “Because of One For All. And because something is changing.”
“Yes.” He does not raise his voice, but the weight of his words fills the room. “You have known about One For All for many years. Longer than most of my closest colleagues. And you kept that secret without question.”
“I made a promise,” Jessa replies softly. “I do not break promises.”
He smiles. “Star and Stripe praises you for the same reason.”
The mention of her friend warms her chest. “Cathy always did have dramatic taste.”
“And excellent judgment,” All Might adds. “She understands the world is shifting. Forces are gathering. I cannot name them yet. I cannot even see the full shape of what is coming. But I feel something. A pressure. A shadow. All For One is not idle.”
Jessa’s shoulders stiffen. “You believe he is planning something.”
“I know he is,” All Might says quietly. “I just do not know when or how he will move. Which means we must prepare our students for challenges unlike any they have faced before.”
She nods. “And that is where I come in.”
“You are here to teach, yes.” His voice gentles. “But you are also here because I trust you with the truth. And because you understand the burden of power without carrying it yourself.”
Jessa breathes slowly. “Does anyone else know about Midoriya”
“A small handful,” he answers. “Aizawa does not. It is better that way for now. And it is important he does not suspect you know anything.”
She presses her lips together. “I can manage that.”
“I know you can,” he says. “You are one of the few heroes I believe can help guide the next generation without fear clouding your judgment.”
She laughs softly. “Fear clouds me all the time.”
“Of course it does,” he says warmly. “You are human. But you move through fear. That is what makes you exceptional.”
Her chest tightens. “I am not exceptional.”
“Yes,” he says firmly. “You are.”
They stand together. All Might places a gentle hand on her shoulder.
“And Jessa. You deserve to reclaim the parts of yourself you left here. Even the painful ones.”
She tries to reply, but her voice catches. She nods instead.
He opens the door for her. “Come. Let me show you your classroom.”
She follows, heart heavy and hopeful at the same time.
She is here for the students.
She is here for Midoriya.
She is here because All For One is preparing his next move.
And she is here because once, long ago, she loved a boy on a rooftop.
A boy who looked at her today like she was a stranger.
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