I FINALLY GOT AN IDEA! No comment. Enjoy.

I don't own FLCL or the song Piano Man. FLCL belongs to Gainax and Piano Man belongs to Billy Joel.
-Randall Flagg2000

Nandaba Naota was insecure
Always trying to be calm and bold
Mamimi would always make out with him
Even though he wasn't that old

But then one day a girl on a motorbike
Came to town from some land afar
Naota now lives in pain when he's bashed in the brain
With Haruko's blue bass guitar

La la la, de de da
La la, de de da da dum

Bash in our brains, you're the vespa girl
Bash in our brains tonight
People say you're a threat to society
But we still say that you're alright

Now Ninamori is Naota's friend
Who hides all her pain from the world
But then Naota freaked out and the school play was ruined
When a robot from her head unfurled

And Haruko works things behind the scenes
Making poor Naota's life living Hell
Butthe boyjust maycarry a torch for her
But now it's too early to tell

Now Amarao's a dumb federal guy
Who's got big eyebrows on his head
And Kitsurubami tried shooting down Canti
But got a crush on him instead

And Amarao tried to ward Naota off
But the kid just won't listen to him
Because he's fallen in love with Haruko
Not knowing she'll never love him

Bash in our brains, you're the vespa girl
Bash in our brains tonight
You may be apathetic, yes it's true
But you bring out our inner light

It's a pretty wild day down in Mabase
Atomsk has destroyed the whole place
And I heard Naota say how he feels today
And he kissed Haruko's pretty face

And Haruko just doesn't give a damn
But she asked Naota to come along
"Hey how would you like to ride on my bike?"
But she changed her mind and said "So long!"

Oh, la la la, de de da
La la, de de da da dum

Bash in our heads, you're the vespa girl
Bash in our heads tonight
Well, you left us in pain and confusion too
But we all still think you're alright

THE END

And that was my parody. I hope you enjoyed it.
-Randall Flagg2000