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Skullgirl: Who Invited the Vocaloid?

Raven_King_Raven
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Synopsis
Be Len Kagamine. Wake up. Talk to your sisters. Kiss your girlfriends. Sing a few songs. Enjoy life. You’re not the most popular Vocaloid, but fame is fame, and honestly? Things are good. Then you check your mail. There’s a letter. It says you’ve been invited to a fighting tournament. Winner gets a wish. There’s a checkbox at the bottom. You tick it. That was a mistake. Now you’re stuck in a city that runs on jazz, violence, and bad life choices—fighting people with superpowers, living weapons, eldritch gods, and a heart that turns girls into monsters. You keep dying. You keep coming back. Your body breaks into code instead of bleeding. And somehow… this is normal for you. Someone really should’ve checked the address. Help. --- MC: Len Kagamine Ship: Len × Harem
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Chapter 1 - Letter

Morning sunlight spilled over a massive mansion, reflecting off smooth marble walls and tall glass windows. The building stood quiet, elegant, and unmistakably expensive.

At the front gate, carved neatly into polished metal, was a single letter.

V.

Inside, in one of the many rooms, a boy slept peacefully.

He had short, spiky blond hair tied into a small ponytail—often compared to a bunch of bananas—bright blue eyes, and a familiar outfit with a sleek, futuristic design that stood out even at rest.

This was Len Kagamine.

[Insert image of Len]

Len slowly opened his eyes.

Something felt… heavy.

He frowned slightly and pulled back the blanket.

Two girls were glued to him.

On his left was a girl with short blond hair and bright blue eyes. A large white bow sat on her headset, and she wore a school-uniform-inspired outfit that gave her a youthful, energetic look.

[Insert image of Rin Kagamine.]

On his right was a girl with long turquoise twin-tails spread across the bed like silk. Her teal eyes were still closed, her face calm. She wore a futuristic schoolgirl-style outfit—grey and silver top, teal tie, black skirt, detached sleeves, and thigh-high socks with matching accents.

[Insert image of Hatsune Miku.]

Len stared at the ceiling for a moment.

'…Of course.'

Carefully—very carefully—he tried to move.

Rin shifted closer, mumbling something incoherent and wrapping an arm around his waist.

Miku followed, instinctively pressing against him, her head resting on his shoulder.

Len sighed.

'So this is how my day starts.'

He didn't try to escape again.

Instead, he lay there, staring at the ceiling as the morning light crept further into the room.

For a moment, everything was calm.

Peaceful.

Normal.

Which meant, of course, it wasn't going to last.

'Okay… how do I get out of this?' Len thought to himself.

'I don't want to wake them up.'

He shifted slightly in the bed.

Miku shifted with him.

Rin followed a second later.

Len sighed.

"Need help, Banana Boy?"

Len blinked.

The door was open.

Standing there was a woman with very long, straight pink hair that reached her thighs, worn loose with one section resting over her left shoulder. Her greyish-azure eyes watched him with clear amusement. A red "03 Megurine Luka" tattoo marked her upper left arm.

She wore a high-collared outfit made of dark, see-through fabric, decorated with gold designs inspired by brass instruments. A blue jewel rested near her throat. One detachable sleeve with nine dots covered her right arm, while her left arm was bare. Headphones sat comfortably on her head.

[Insert image of Megurine Luka.]

Len looked at his savior like she had just descended from heaven.

"Yes," he said immediately. "Please."

Luka smiled and walked closer, leaning down toward him.

"Alright," she said softly. "But I get a kiss afterward."

Len nodded without hesitation.

No arguments.

No hesitation.

This was a fair trade.

Luka took a careful look at the situation.

Two girls.

One blanket.

Zero margin for error.

"Alright," she muttered. "Let's do this."

She gently lifted Rin's arm first, slow and precise, like she was defusing a bomb. Len barely breathed as Luka slid his arm free, centimeter by centimeter.

So far, so good.

Then Rin mumbled.

"…Len…?"

Len froze.

Rin's hand suddenly grabbed the back of his shirt.

"Where are you going…?" she muttered, half-asleep, tightening her grip.

Luka stopped instantly.

'Nope. Not moving,' Len thought.

Luka leaned in, whispering, "Rin. Sweetie. Let him go."

Rin frowned in her sleep.

"…Five more minutes."

She loosened her grip just enough.

Luka didn't hesitate. She gently pried Rin's fingers off and replaced them with the edge of a pillow.

Rin hugged it without question.

Crisis one: avoided.

Now Miku.

Luka carefully shifted the blanket, easing Len out inch by inch. Miku didn't move.

For a moment, Len thought they were safe.

Then—

Miku's eyes snapped open.

She sat up instantly.

"…Len?"

Len was already halfway out of the bed.

Luka moved fast.

She covered Miku's eyes with one hand and leaned in.

"Shhh. He's getting breakfast."

Miku blinked.

"…Without me?"

"Yes."

Miku stared at her for a long second.

"…Okay."

She flopped back onto the bed, hugging Len's pillow.

Silence.

Len stood there, free at last, staring in disbelief.

"…How did that work?"

Luka smirked.

"Experience."

Len exhaled in relief.

Then—

The door closed behind them.

From inside the room, Miku's voice drifted out, soft but certain.

"Bring him back."

Len stiffened.

Luka laughed quietly as she started walking down the hallway.

"Don't worry," she said. "You're on borrowed time."

Len sighed.

'Yeah… that sounds right.'

Luka stopped a few steps down the hall and glanced back.

"So," she said casually, "about my reward."

Len sighed and stretched his arm out.

"Fine. Here's your kiss."

He wrapped an arm around her waist and rose onto his tiptoes. Luka leaned down just enough for their lips to meet.

A quick kiss.

Then another.

Luka pulled back with a satisfied hum, brushing her thumb under his chin.

"Good boy."

Len turned slightly red and looked away.

'Worth it,' he thought.

They headed downstairs together.

The smell of food hit Len first.

In the dining area, two familiar figures were already awake—people Len didn't hesitate to call the parents of this whole mess.

Seated at the table, scrolling through his phone, was a man with short blue hair and fair skin. A long blue scarf hung loosely around his neck, almost as iconic as the relaxed expression on his face. He wore a white jacket with blue accents over a blue shirt, dark pants with yellow stripes, and white boots kicked casually under the table.

[Insert image of Kaito.]

Standing at the kitchen counter was a young woman cooking with practiced ease. She had short, practical brown hair and sharp brown eyes. A red, sleeveless jacket rested over a transparent crop top, a black choker snug around her neck. Transparent cuffs with red visualizer patterns wrapped her wrists as she worked, one hand occasionally adjusting the Shure 55SH microphone resting nearby.

[Insert image of Meiko.]

Kaito glanced up from his phone.

"Oh," he said. "You survived."

Len sighed. "Barely."

Meiko turned slightly, smiling when she saw him.

"Breakfast will be ready in a minute," she said. "Sit down before you get dragged back upstairs."

Len didn't argue.

He took a seat immediately.

Luka chuckled and leaned against the counter, watching the scene like this was just another normal morning.

Which, for them, it was.

And that somehow made everything worse.

Len had just relaxed into his chair when something slammed into him from the side.

"Len-kun~!"

"Oof—" Len barely caught himself. "Hi, Gumi."

The girl clinging to him had shoulder-length emerald-green hair with soft bangs framing her face, matching green eyes sparkling with energy. She wore her familiar orange, yellow, and white outfit—an orange jacket over a layered skirt, white cuffs, and a pink garter strapped to her left thigh. Silver goggles with red-tinted lenses rested against her headphones, bouncing slightly as she moved.

[Insert image of GUMI.]

She wrapped her arms around him tightly, pressing her cheek against his shoulder and nuzzling happily.

"Miku and Rin got you all night," she said smugly. "But now I have you."

Len sighed, already patting her head out of habit.

"…Good morning to you too."

Kaito glanced up from his phone. "You know, you're going to spill your breakfast on him before he even gets it."

Meiko snorted. "At least let him eat first."

Gumi ignored them completely, tightening her hold just a little.

Len didn't fight it.

This was just how mornings worked around here.

And somewhere deep down, he had a bad feeling the universe was about to ruin it.

"Alright," Meiko called out, setting plates down on the table, "food's ready. Everyone, sit."

That got results.

Gumi finally released Len—reluctantly—and took a seat beside him. Luka claimed a spot across the table, resting her chin on her hand. Kaito put his phone down and leaned back in his chair.

Len reached for his food.

Then paused.

The table was full.

The house was awake.

No one was yelling.

Nothing was on fire.

Len frowned.

'…It's too quiet,' he thought.

'Something's wrong.'

He glanced around, half-expecting chaos to drop from the ceiling.

Nothing happened.

Meiko slid a plate in front of him. "Eat."

Len nodded slowly. "Yeah… okay."

He took a bite.

It was good.

Too good.

That didn't help the feeling.

Kaito noticed his expression. "You look like you're waiting for the world to end."

Len swallowed. "I usually am."

Luka smiled knowingly. "Give it a minute."

As if on cue, something clinked against the front gate outside.

Len froze.

Everyone else did too.

The sound came again.

Metal.

Light.

Precise.

Len sighed and leaned back in his chair.

"…There it is."

Meiko blinked. "What?"

Len stood up. "Mail."

The front door opened.

A young man stepped inside, looking completely baffled.

He had a classical, slightly gothic appearance—something between a choir boy and an eighteenth-century noble. His clothes were neat, formal, and a little old-fashioned, which only made the situation feel stranger.

[Insert image of Oliver.]

He stood there holding an envelope, staring at it like it might bite him.

"…I was with Teto and Akari," he said slowly, blinking, "and this thing just—"

He searched for the right word.

"…summoned itself."

The room went silent.

Len stared at the letter.

Then he rubbed his face.

"…Of course it did."

Kaito leaned forward. "Let me guess. Fancy paper?"

Oliver nodded. "Gold trim."

Meiko sighed. "That's never good."

Luka smiled faintly. "Well?"

Len straightened.

"…Yeah," he said. "That's for me."

And the universe finally smiled.

Luka raised an eyebrow, looking between Len and the envelope.

"How," she asked calmly, "are you sure it's about you?"

Len pointed at Oliver's hands.

At the envelope.

Right there on the front, written in elegant ink, were two letters.

L. E.

"…Yeah," Len said. "That's mine."

He took the letter.

The paper felt wrong in his hands. Too cold. Too heavy. Like it didn't belong in this house.

Everyone watched as he broke the seal.

Len unfolded the letter and read.

His expression didn't change.

That was what worried them.

"Dear Len Kagamine," he read aloud.

"You have been formally invited to participate in a fighting tournament.

The prize: one wish, granted without limitation."

The room went dead silent.

Len continued.

"Location provided upon acceptance.

Transportation will be handled automatically.

Refusal is… discouraged."

He stopped.

Slowly folded the letter.

"…Huh."

Gumi leaned closer. "That's it?"

Len nodded. "That's it."

Kaito exhaled. "That's bad."

Meiko crossed her arms. "That's very bad."

Luka tilted her head. "So… are you going?"

Len looked at the letter again.

Then smiled.

"…Sure."

The letter burned away in his hand, dissolving into light and symbols that vanished into the air.

And somewhere very far away—

---

Zana stood in front of his mailbox.

He checked it.

Empty.

He checked again.

"…Huh."

He looked down at the address written on the invitation in his hand.

Correct coordinates.

Correct timing.

Wrong country.

Zana frowned.

"…That's odd."

Behind him, the mailbox creaked softly.

Like it was laughing.

To be continued

Hope people like this ch and give me power stones and enjoy