The morning sun filtered through my bedroom window, casting golden streaks across my All Might posters, a reminder of the hero I aspired to be.
Internship offers cluttered my desk: Hawks' sleek card, Nighteye's formal letter, Endeavor's curt note burning with intensity. My knowledge knew the Hero Killer Arc loomed, a dark tide rising in Hosu City.
I'd tested All Might and Mirio's One For All as a disguised All For One, confirming their strength but also my duty to grow. Today, internships began, and my choice would set the stage.
I dressed in casual clothes, my hero costume packed for the journey to Hosu City. Inko bustled in the kitchen, her green hair tied back, apron dusted with flour.
"Izuku! Breakfast before you go!" Her voice was warm, grounding me despite the All For One shadow. I hugged her, savoring the smell of miso soup and tamagoyaki.
"Thanks, Mom. Big day." She beamed, eyes misty. "My champion, off to intern with heroes! Who'd you pick?" I hesitated, the decision fresh but firm.
"Endeavor's agency. He's intense, but I'll learn a lot." Her smile faltered-she'd heard of Endeavor's reputation-but she nodded. "Be careful, Izuku. You're strong, but you're still my boy."
Her words hit deep, the memory of All For One's betrayal sharp. I promised to call, hiding the pain. We ate, her chatter about neighbors and my baby photos a balm.
"You were always so determined," she said, showing a picture of toddler-me, unaware of the quirk stolen from me. I smiled, "Still am, Mom."
After breakfast, I grabbed my bag and headed to U.A. for the internship briefing. The campus buzzed, Class 1-A gathering in the homeroom, Aizawa's bandaged form at the podium.
His eyes, sharp despite the scars, scanned us. "Internships start today. Choose wisely-your agencies will shape your paths." His gaze lingered on me, the Sports Festival's Green Spark, a warning in his stare.
I nodded, my choice of Endeavor deliberate-his fire matched my Saiyan power, and Hosu City's unrest aligned with Stain's rumored attacks. My knowledge knew the arc's stakes: Iida's brother, Tensei, crippled by the Hero Killer, driving Iida to revenge.
Iida sat rigidly, glasses glinting, his usual energy dimmed. Uraraka nudged me, whispering, "He's been quiet since yesterday. Something's wrong."
Her concern mirrored mine-Iida's discipline was his core, but his clenched fists betrayed turmoil. Kirishima leaned over, red hair spiked. "Heard from Tensei's agency? Something bad went down."
Tsuyu ribbited softly, "Ribbit, he's not talking much, even to me." Todoroki, nearby, frowned, his heterochromatic eyes on Iida. "He's hiding something." Momo adjusted her ponytail, voice low. "Iida's brother... there's news from Hosu."
Before I could approach, Aizawa called us to attention, assigning agencies. Uraraka got a rescue-focused agency, Kirishima a combat one, Tsuyu a versatile hero, Todoroki his father's agency (begrudgingly), Momo a strategic firm. Iida's choice was Manual's agency in Hosu-my knowledge flagged it: the same city as Tensei's attack, a clear sign of his revenge plan.
My name came up. "Midoriya, Endeavor's agency," Aizawa said, eyebrow raised. "Bold choice. Don't let his temper outshine your control." I nodded, Saiyan aura steady, ready to face the Flame Hero.
After the briefing, I tried talking to Iida. "Hey, you okay?" His response was clipped, eyes averted. "I'm fine, Midoriya. Focus on your internship." He walked away, shoulders tense, leaving Uraraka and me exchanging worried glances.
"He's not himself," she said, her voice soft. I squeezed her hand, her warmth grounding me. "I'll keep an eye out in Hosu. He's at Manual's agency-same city as me."
Kirishima clapped my shoulder. "You got this, man. Save Iida from whatever's eating him." Tsuyu ribbited, "Be careful, ribbit. Hosu's dangerous now."
The train to Hosu was packed, my hero costume case at my side. I reviewed my powers, Analytical Mind strategizing. Saiyan Physiology at 50% could shatter steel, outrun bullets, tank explosions-Endeavor's flames would test that.
Transform offered disguises-maybe a civilian to scout Hosu's alleys? Harry Potter magic was my edge without Major Telekinesis: Accio for objects, Protego for defense, Apparition for mobility. Senzu Beans (41) guaranteed full recovery-each bean restoring health, stamina, and energy to 100%, per Dragon Ball Z. The Vampire Dungeon ticket stayed untouched, its quest too risky pre-internship.
Hosu City's skyline loomed, smoke curling from distant streets-Stain's work, or something else? Endeavor's agency was a sleek fortress, its red and gold exterior screaming intensity.
I stepped off the train, aura flickering, and was met by a sidekick, Burnin, her green hair aflame. "Midoriya, huh? Boss says you're the real deal!" Her grin was fierce, but I sensed respect-my festival win had reached Endeavor.
I followed her inside, the agency bustling with sidekicks analyzing villain reports. Stain's name surfaced in hushed tones, his blade a terror in Hosu.
Endeavor awaited in his office, flames licking his shoulders, blue eyes piercing. "Midoriya," he growled, "you're here because you're strong. Don't waste my time."
His presence was oppressive, like facing a volcano. I stood tall, Saiyan strength steady. "I'm here to learn, sir. Let's stop villains like the Hero Killer."
His eyes narrowed-Stain was a sore spot, having humiliated heroes like Tensei. "Prove you're worth it. Patrol tonight. Hosu's crawling with trouble."
Training began immediately, Endeavor's sidekicks drilling me in combat scenarios. I sparred, restraining my Saiyan power to 30%, punches denting training pads.
Burnin laughed, "Kid, you're a monster!" I used Transform subtly, shifting my stance to mimic Endeavor's for a moment, testing his style.
Protego blocked a fiery attack, earning nods. "Weird quirk," a sidekick muttered, unaware of my magic. I kept Senzu Beans ready, their full healing power my safety net.
Between drills, I overheard reports: Tensei, Ingenium, paralyzed by Stain's blade, confirmed yesterday. My heart sank-Iida's silence made sense now. I texted him, "Heard about Tensei. I'm in Hosu-talk if you need me."
No reply, but I knew he was hunting Stain, his revenge blinding him. My knowledge screamed: canon Iida nearly died facing Stain alone. I'd watch him, keep him safe, even under Endeavor's watch.
Night fell, and patrol loomed. Endeavor briefed us, his flames flaring. "Stain's targeting heroes. Stay sharp, Midoriya." I nodded, aura controlled, but my mind was on Iida.
Hosu's streets were tense, civilians hurrying home, rumors of the Hero Killer spreading fear. I scanned alleys, Saiyan senses alert-no Stain yet, but the arc was beginning.
I'd train with Endeavor, grow under his fire, and protect Iida from his own rage. The system's balance had shaped me-50% Saiyan, magic, Transform-but heroism would define me.
Some time later
The streets of Hosu City pulsed with an uneasy rhythm, the neon glow of signs casting jagged shadows across the pavement.
My internship with Endeavor's agency had thrust me into a crucible of tension-patrolling a city on edge, where whispers of the Hero Killer, Stain, sent civilians scurrying indoors as dusk fell. But my focus was split: mastering my Saiyan power and watching Iida, whose silence screamed revenge.
The system's interface flickered unprompted as I adjusted my hero costume, its mechanical voice cutting through my thoughts.
System Notice: Clarification - User's Saiyan Physiology pull (pre-USJ) transformed user into a full Saiyan, replacing human physiology. Current mastery at 50% reflects Broly-level potential, restrained for heroism.
I froze, heart racing. A full Saiyan? Not just a quirk or power-up, but my very being rewritten? My freckled face, green hair-they hid a Saiyan core, explaining the green aura, the berserk edge I fought to control.
The system's swap from Superpower to Saiyan Physiology wasn't just balance-it was a rebirth, hiding me from All For One's radar. My resolve hardened: Saiyan or not, I was Izuku Midoriya, hero.
Endeavor's agency buzzed with activity, sidekicks like Burnin analyzing Stain's patterns. My first patrol loomed tonight, but my thoughts were on Iida. At U.A., he'd been distant, his glasses hiding pain after news of his brother, Tensei, crippled by Stain.
His clipped words-"Focus on your internship, Midoriya"-and tense shoulders confirmed it: Iida was hunting the Hero Killer, revenge blinding him. Canon Iida nearly died in Hosu's alleys; I'd keep him safe, even under Endeavor's fiery gaze.
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Iida's POV
The hospital room smelled of antiseptic, a sterile prison for my brother's broken body. Tensei lay in the bed, tubes snaking from his arms, monitors beeping faintly. His once-vibrant face, the face of Ingenium, was pale, his eyes dull with pain.
The doctors' words echoed: "Permanent paralysis. Spine severed. He's stable, but... he's on the verge of death." My fists clenched, glasses fogging with unshed tears. Stain's blade had stolen his legs, his career, nearly his life. The Hero Killer's ideology-purging "false" heroes-meant nothing to me. He'd taken my brother, my idol.
I gripped Tensei's hand, his weak squeeze breaking me. "Tenya," he rasped, voice barely a whisper, "don't... chase him. Stain's too dangerous." His warning pierced, but rage burned hotter. "I can't let him walk free," I said, voice trembling.
Tensei's eyes widened, fear mixing with pain. "You're not ready. Live... for heroism, not revenge." I stood, unable to meet his gaze. "I'll make this right."
My internship with Manual in Hosu wasn't coincidence-I'd chosen it to hunt Stain, to end him. Midoriya, Uraraka, the others-they'd try to stop me, but this was mine. I left the room, resolve like steel, revenge my only path.
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Izuku's POV
Back at Endeavor's agency, the briefing room was a furnace of intensity. Endeavor stood, flames licking his shoulders, blue eyes like lasers. "Midoriya, patrol the east district tonight. Stain's active-find any trace of him or his victims."
His voice was a growl, his hatred for Stain palpable after Tensei's attack. Burnin tossed me a comms device, her fiery hair flaring. "Kid, you're a beast, but don't get cocky. Hero Killer's no joke." I nodded, Saiyan senses sharp, aura restrained at 30% per my plan-enough to handle threats, not enough to wreck Hosu.
The east district was a maze of narrow alleys and flickering streetlights, Hosu's tension thick. Civilians avoided eye contact, shops shuttered early.
I patrolled, Saiyan senses scanning-heartbeats, heat signatures, the faintest rustle. Endeavor's sidekicks flanked me, but I took point, green aura low to avoid notice.
My knowledge flagged Hosu as Stain's hunting ground, but tonight felt off, like a storm brewing. I texted Iida again: "In Hosu. Stay safe, let me know where you are." No reply-his silence screamed danger.
Halfway through the patrol, a guttural roar shattered the quiet. My senses locked onto it-an alley two blocks away. I sprinted, Saiyan speed blurring, leaving sidekicks behind.
"Midoriya, wait!" Burnin shouted, but I was gone. The alley reeked of blood and decay, and there it was: a rogue Nomu, its hulking form hunched over a dumpster, claws dripping red.
My heart sank-this wasn't Stain, but a remnant from USJ, where All Might had smashed a Nomu skyward. This one was smaller, bird-like, with a single eye and jagged wings, but its aura screamed danger.
The Nomu lunged, claws slashing. I dropped to 30% Saiyan power, dodging with ease, the air whistling. "Protego!" I cast, a magical shield blocking a second strike, sparks flying.
The sidekicks caught up, Burnin firing flames, but the Nomu's hide absorbed them, shrieking. I used Transform, shifting into a steel golem to test its strength, my Saiyan core intact.
It's claws raked my form, but durability held-no damage. I reverted, landing a Kinetic Glove punch at 30%, cratering the alley wall as the Nomu staggered.
"Stay back!" I yelled to the sidekicks, apparating behind the Nomu with a crack. Stupefy stunned it briefly, its eye glazing, but it roared, wings flapping, launching a shockwave.
I tanked it, Saiyan durability unshaken, and countered with a restrained kick, sending it crashing into a wall. My Analytical Mind noted: multi-quirk, like USJ's beast-strength, speed, regeneration.
I couldn't escalate to 50%-too much collateral risk. Instead, I cast Sectumsempra, wandless slashes cutting its wings, blood spraying. It howled, regenerating slower than USJ's monster.
Burnin shouted, "Kid, you're nuts!" I ignored her, using Accio to summon debris-bricks, pipes-pummeling the Nomu. It charged, and I met it head-on, 30% punch amplified by Kinetic Glove, cracking its skull.
The Nomu flew back, twitching, then stilled. I panted, aura fading, checking for civilians-none harmed. The sidekicks secured the area, Burnin grinning. "Damn, Midoriya. Endeavor's gonna love you."
I reported via comms, Endeavor's voice sharp. "Nomu? Not Stain, but connected. Keep patrolling." My mind raced: Nomu in Hosu meant the League of Villains, Shigaraki's hand behind it.
Stain was still out there, and Iida was a ticking bomb. I scouted further, Saiyan senses finding no Hero Killer, just fear-soaked streets. Iida's silence gnawed-I knew he was in Hosu, likely stalking alleys, chasing Stain's shadow.
Back at the agency, Endeavor debriefed, flames low but intense. "Good work, Midoriya. Nomu's a League creation-Stain's a loner, but Hosu's a hotspot. Stay vigilant." I nodded, hiding my worry for Iida. Burnin clapped my shoulder. "You're a freak, kid. Keep it up."
I forced a smile, but my thoughts were on Tensei's fate, Iida's rage. My Saiyan power, Transform, and magic had handled the Nomu, but Stain's ideology-and Iida's revenge-were the real threats. Tomorrow, I'd patrol again, find Iida, and stop him before he faced the Hero Killer alone.