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.


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MC: Len Kagamine
Ship: Len × Harem

Len Harem