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English
Series:
Part 1 of Vocaloid x My Hero Academia AU
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Published:
2025-05-30
Updated:
2026-04-10
Words:
23,926
Chapters:
17/?
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34
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Three Girls Using The Law Like A Jump-rope (sometimes unwillingly)

Summary:

Former title: A Couple of Vigilantes

Hatsune Miku, Kasane Teto and Akita Neru exist in the My Hero Academia universe. They fumble around life trying their best to survive. Unfortunately dealing with the yakuza, conspiracies regarding one of the largest pizzeria chains in the world, a cannibalistic woman and her insane girlfriend and most importantly a 200 year old supervillian makes that hard to do. But they're surviving. Somehow.
Whether they do it successfully, is yet to be seen.
(This is a crack fic that sometimes takes itself seriously yet everyone is majorly out of character and they all have one braincell and it's fuelled purely by headcanons and rage towards Endeavour. Also it has references to every media I'm interested in which includes Five Night's at Freddy's. I apologise.)

Pre-UA arc: Chapters 1 - ??

Notes:

Blame Kocchi No Kento for bringing this into existence. If he didn't make such banger songs then my hyperfixation wouldn't have returned.

Check out the Kekka Orai cover by Halo-P. It deserves more love, I love how Miku is tuned in it!

Chapter 1: Prologue

Summary:

The Triple Baka Squad decide to become vigilantes! Whether they actually commit to the idea is up to them.

Notes:

Blame My Hero Academia Vigilantes for this existing. Especially the theme song, Kekka Orai. Check out the Hatsune Miku cover by Halo-P as well.

(See the end of the chapter for more notes.)

Chapter Text

It was another boring day inside the Triple Baka apartment. Teto was cooking dinner inside the kitchen, Neru was watching videos on her phone while Miku was watching TV. Letting out a sigh, the blue-haired girl looked at her two friends.

Life was agonisingly boring. They needed something to do.

"We should become vigilantes."

As if a pin dropped, Neru snapped her head up to meet her friend. "Miku. Have you finally gone insane??" Despite not showing her emotions often, shock was clear on her face. "That's illegal!"

"But Neru, what's more illegal? Having a boring life, or helping people?"

"Being a vigilante you idiot." Neru grabbed a green onion shaped pillow and smacked her over the head with it. "Ah!" Miku rubbed the top of her head. It didn't hurt a lot, but it still stung.

"Come on Neru! We're too broke to go to hero school, but we could help people!" Neru left out a huff. Crossing her arms, she leaned back.

"You're an adrenaline junkie, Miku. If you wanted to help people, you would take after that Nice Guy, fella," Neru point-blank told her. Miku thought for a moment.

"I'm pretty sure he goes by The Cruller now."

Before the two could bicker even more, Teto waltzed into the sitting room with their dinner. "Spaghetti and meatballs!" The red one declared happily. The other two practically salivated witnessing the food.

"Thanks Teto!" Miku thanked the red head before taking her plate. "So, what were you guys talking about?" Teto questioned, leaning back into an armchair.

"Miku wants to be gay and do crime." Neru replied casually."

Teto almost spat out her food. "Huh???" She looked horrified. Miku shook her head.

"Let me rephrase," taking a breath she continued. "I want us to become a vigilante team. Money is tight, I know. Going to U.A would be basically impossible since we all dropped out and I know our quirks aren't the strongest, but I think we can help out people." Miku gave her friend a hopeful smile. "Would you guys consider it?"

Teto pondered for a moment. "What about Team Idaten? The group that Ingenium leads? If we wanted to do hero work, we could sign up there. We could earn money from there." Miku shook her head.

"Pretty sure you have to be scouted for that."

Teto let out a sigh, fidgeting slightly. Her dragon wings shuffled behind her. "As much as I would love to help out people, I really don't want to get arrested." Neru looked victorious while Miku looked crushed.

"Ha! I told you!" Teto looked at her friend with sympathy. "Sorry Miku.

Miku let out a long sigh. "What if I told you guys that I made us matching uniforms?" That caught their attention. Miku stood up and walked into her room, slamming the door. Teto scowled at the yellow one.

"Look at what you did! You hurt her feelings!"

Neru looked offened. "Me? You also told her not to do it!"

"Yeah but at least I let her down gently and giving her other options!" As the two bickered, Miku's door opened once again.

Stepping out of her room, Miku now had her pigtails in black and pink square ribbons. She was now wearing a grey, sleeveless blouse, teal tie and dark grey detached sleeves with a teal trim that fans out near the wrists. She now wore a black thigh length skirt with teal trim and thigh-high socks that blend into her shoes with teal trims at the soles. Pride coloured her face. "What do you guys think?" She inquired while putting on a black mask to obscure her face.

The two looked at Miku in slight confusion. "We don't have to fight evil people, but we can help people who need help for the mundane." She took Neru's words into consideration. "Please?"

The other two looked at each other. Neru thinned her lips and gave Teto a nod. She was the one calling the shots. Letting out a defeated sigh, Teto looked up at her friend. "Alright. Let's help people out.."

Miku's eyes lit up with life no other. Hugging the others girls, she practically squealed. "I promise you guys, you won't regret it!"

As the evening slowly turned into night, three knew vigilantes made their debut.

 


I don't know why, but the notes for this chapter is tweaking out so I'm just gonna put their quirks here.

The girl's quirks:

Hatsune Miku: Miku-Miku Beam. Inspired by Magical Cure Love Shot. They essentially act like ki-beams from Dragon Ball.

Kasane Teto: Dragon. She's a chimera, her quirk is kinda obvious. She's able to breathe fire and has dragon wings and a tail.

Akita Neru: Energy Compression. Kinda inspired by Stop Nagging Me. If she gets hit, her body stores the power and she's able to hit back twice as hard.

Notes:

The girl's quirks:

Hatsune Miku: Miku-Miku Beam. Inspired by Magical Cure Love Shot. They essentially act like ki-beams from Dragon Ball.

Kasane Teto: Dragon. She's a chimera, her quirk is kinda obvious. She's able to breathe fire and has dragon wings and a tail.

Akita Neru: Energy Compression. Kinda inspired by Stop Nagging Me. If she gets hit, her body stores the power and she's able to hit back twice as hard.

Alright, I hope you have a nice day/night!!