A slow-burn Aizawa Shouta fanfiction set from early My Hero Academia canon through the final war, exploring adult love, trauma, and healing.
Fifteen years ago, Jessa left Japan believing she had lost everything—her best friend, her home, and the boy she loved.
Now one of America’s top-ranked pro heroes, she returns to U.A. at All Might’s request, tasked with helping train and protect Midoriya Izuku as the world edges closer to collapse. She expects battle. She expects villains. She does not expect Aizawa Shota—the man she left behind—to still haunt her dreams, or to be so profoundly changed by loss, injury, and regret.
As war erupts and heroes fall, buried truths resurface. Love left unspoken, grief left unresolved, and guilt carried for far too long force them to confront what silence destroyed. Between the final battles of My Hero Academia and the quiet devastation that follows, two deeply imperfect adults must decide whether healing is still possible.
This is not a story about fixing what’s broken.
It’s about choosing each other—scars, fear, and all—and learning how to live again.
Resonance of the Past- An Aizawa Shouta fanfiction
Prologue: Rooftop Beginnings
(Flashback — Years Ago)
Jessaline Shimizu stands in front of UA High with sweaty palms and a rehearsed greeting that has already dissolved into panic. Her suitcase rattles behind her as she bows to the waiting group of students.
“H-hello. I am new exchange student. Nice… to meet… you.”
Her Japanese crumbles on the last word. Her heart sinks. She considers pretending she never arrived.
A laugh bursts out in front of her, bright and warm.
“Your Japanese is adorable. Completely terrible, but adorable.”
She looks up to see a boy with silver hair fluffy like a storm cloud, eyes bright with mischief. He plants his hands on his hips and grins like the world itself is a joke he is happy to share.
“I am Shirakumo Oboro,” he declares proudly. “The coolest student you will ever meet. Probably the coolest person you will ever meet. But you can decide that later.”
Jessaline blinks. “Coolest person”
“Absolutely. Top of the charts. World famous, one day.”
Another boy skids to a stop beside him, nearly knocking Oboro over. He switches to awkward English with the confidence of someone who should not be this confident.
“Hello. I am Yamada Hizashi. Welcome to Japan. My English is very good.”
“It is not,” Oboro says immediately.
“It is improving,” Hizashi says, ignoring him and grinning hard.
Jessaline tries not to laugh. “Thank you. I am Jessaline. Shimizu Jessaline.”
“Shimu… Shimi… Shimmy.” Hizashi pumps his fist. “Your name is now Shimmy.”
“No,” Oboro says, smacking the back of his head. “Her name is Jessaline.”
Jessaline shakes her head gently. “It is okay. My friends call me Jessa.”
Oboro brightens. “Then Jessa it is. Welcome to the rooftop crew.”
“The what crew” she asks.
“You will see,” Hizashi says ominously.
Before she can ask, a quiet voice cuts through.
“Her Japanese is not that bad.”
A dark-haired boy stands just behind the others. He is tall for his age, tired-looking, with hair that seems permanently windblown. His eyes are sharp but not unfriendly, and he watches her like he is cataloging details with calm precision.
Aizawa Shota.
She bows again. “Thank you.”
He studies her for a moment, then says, “If you need help with homework or Japanese lessons, I can teach you.”
Hizashi gasps dramatically. “He offers lessons to no one. You have been chosen.”
Oboro elbows Shota. “She is not even here an hour and you are already attached.”
Shota shrugs. “She needs help.”
Jessaline blushes. “I would like that. Very much.”
Shota nods once, monotone but sincere. “Then I will help you.”
The tension is shattered by a purposeful stride and a flick of violet hair.
A girl who looks older, more powerful, and annoyingly confident steps toward them. She is only a third-year, but she carries herself like a pro already.
“Move aside, children. The queen has arrived.”
Oboro laughs. “Perfect timing. Jessa, this is Kayama Nemuri. She is a third-year and she has already decided she will adopt you.”
Nemuri looks Jessaline over with sharp eyes and a slow smile. “Pretty girl. Terrible Japanese. You will fit in perfectly. Stick with me and I will teach you slang and survival skills.”
She claps a hand on Jessa’s shoulder. “Welcome to UA.”
And just like that, Jessa belongs to them.
A Few Weeks Later
UA’s rooftop becomes their unofficial territory.
Lunchboxes and textbooks scatter across the ground. Oboro sprawls out like a cat soaking sunlight. Hizashi bounces between conversations, his energy impossible to contain. Nemuri usually stretches or reads fashion magazines. Shota leans against the railing, legs stretched out, head tipped back like he is eternally two minutes from a nap.
Jessa sits with her notebook open, tongue between her teeth in concentration.
“Hashiru means to run,” Shota says calmly. “Aruku means to walk.”
She groans. “I keep forgetting.”
“You remembered yesterday.”
“I forgot today.”
He studies her for a moment, then nods. “Then you will remember tomorrow.”
Oboro leans close to Hizashi and whispers loudly, “He is flirting.”
“It is tragic,” Hizashi whispers back.
Nemuri rolls her eyes. “It is cute.”
Jessa lowers her notebook. “I am right here.”
“We know,” Oboro says cheerfully.
Hizashi grins. “At this rate you two will be dating by the cultural festival.”
Both Jessa and Shota freeze.
“It is not like that,” Jessa says quickly.
“No,” Shota agrees without missing a beat. “It is absolutely not.”
Oboro exchanges a look with Nemuri. “It will be.”
Nemuri nods. “Definitely.”
Jessa sputters. Shota pretends to read.
Quirk Practice on the Rooftop
Oboro claps his hands together. “Alright. It is time. Jessa, show us your water quirk.”
She hesitates. “It is not very impressive.”
“We believe in you,” Nemuri says cheerfully.
“Also we are bored, so this is perfect,” Hizashi adds.
Jessa takes a breath and steps forward. The air shimmers as moisture gathers, drawn to her fingertips. A ripple vibrates the space around her, and swirling ribbons of water form at her sides, spiraling upward like liquid glass.
“Woah,” Hizashi says softly.
She tries to make the water dance, but the motion jumps too fast, spinning wildly. A wave splashes forward.
Directly into Shota’s face.
There is a moment of pure silence.
Then Oboro explodes into laughter.
Shota stands dripping, hair plastered to his cheeks, eyes half-lidded with supreme annoyance.
“You need control,” he says flatly.
She squeaks. “Sorry. Sorry I did not mean to splash—”
He looks at her. His eyes glow red.
Her quirk cuts out instantly. The remaining water splashes harmlessly onto the cement.
She blinks at him in shock. “You erased it. That feels so strange.”
“You will get used to it.” He wipes his face with his sleeve. “Try again Jessaline. But slower this time.”
She swallows and nods. “Okay. Yes. Please teach me.”
He steps behind her, close enough to guide but not enough to crowd. “Start smaller. Do not force the energy. Pull from the air, not your body.”
She tries again. This time the water forms a clean sphere in her palm, shimmering gently instead of exploding.
She beams with pride. “I did it.”
“You did,” Shota says. “Your control improves quickly.”
Oboro leans over to Hizashi, stage whispering, “This is absolutely a romantic drama.”
Nemuri smirks. “Episode one. Special rooftop edition.”
Jessa ignores them and looks at Shota. “I like Jessa, by the way.”
“What”
“When you call me Jessaline it feels formal. When you call me Jessa it feels like… I belong.”
Shota considers this for several seconds. “Then Jessa suits you.”
Her cheeks warm. Her heart beats a little harder.
As the sun dips lower, the warm glow turns the rooftop gold. Hizashi sings loudly and off-key while Nemuri pretends she is not amused. Oboro tells a story about getting lost on campus and being rescued by a teacher’s dog.
Jessa laughs freely, head tilted back, hair catching the light. Shota watches her for a moment too long. She notices, and for a heartbeat they simply look at each other, two kids sharing something they do not yet understand.
Oboro leans toward Nemuri. “They are going to fall in love.”
Nemuri nods confidently. “Without question.”
Jessa looks away with a shy smile. Shota looks down at his book to hide one of his own.
The breeze carries the scent of fresh grass. The day fades into warm twilight. The rooftop feels like a secret world made only for them.
A place of beginnings.
A place they will always return to.
Even when everything else falls apart.
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