Lyrics translation is something like that:

This song is dedicated to the "kawaii" girl, by the name Hakuri.

NYAAA NYAAA NYAAA NYAAA
NYAAA NYAAA NYAAA NYAAA

She appeared right in front of me, like a kawaii angel,
She illumined me like the Sun in the morning,
But when I turned my back to her -
She sawed me with the saw IN HALF!

saying

NYAAA NYAAA NYAAA NYAAA
NYAAA NYAAA NYAAA NYAAA

You still do not believe in the kawaii love?
The whole world is a trap for you, and your head is a vise?
Then tonight your blood will shed,
Hakuri's gonna tear you TO THE PIECES!

saying

NYAAA NYAAA NYAAA NYAAA
NYAAA NYAAA NYAAA NYAAA

This is the last step on the way to the salvation
This is the last step on the way to the kawaii
This is the last step on the way to the oblivion...
Hakuri, I LOVE YOU!

I KNOW!!!

NYAAA NYAAA NYAAA NYAAA
NYAAA NYAAA NYAAA NYAAA