From an interview in PHY magazine:
Lime said that a sad event — the death of his hamster — inspired the song:
When he died, I was incredibly sad. I wrote the song remembering how lively he was, imagining him running on his wheel.
— Is that why the song has such a restless, fast rhythm?
There’s also a line like ‘You’ll conquer the world with your cuteness’ — that’s about him too. So with the feeling of ‘hamsters really are so adorable,’ I wrote this song, contrasting that with human foolishness and ugliness.
JP: PARASITE
Devouring everything without a trace,
Even the nearest worlds — one after another.
Drinking to the last drop both tears and prayers, along with life itself,
Toppling the sky, drying up the seas, crossing the universe on that rocket toward the nearest worlds…
And still, you radiate charm again,
Even beyond the Solar System.
I will deliver to you, from a world where prayer has no meaning,
What on this planet is called, for example, love.
Hold it carefully so you don’t lose it,
Cling to it together with life itself.
Devouring the universe, draining galaxies, heading toward neighboring worlds,
We will go on destroying each other even beyond the far side of the universe.
And yet, it seems you will conquer the world with your charm,
And the entire Solar System.
In this world, if the time and place of birth are different…
People are still people, yet everything is completely different.
Nearby, people are killing one another,
Taking everything from each other.
Toppling the sky, drying up the seas, crossing the universe on that rocket toward the nearest worlds…
And still, you radiate charm again,
Even beyond the Solar System.
Spinning fruitlessly, casting down the sky,
Surpassing the heavens, praying for them…
Let me tell you the truth of this disappointing world.