Disgaea: Hour of Darkness - Tsunami Bomb - The Invasion From Within

This track was used exclusively in the PlayStation 2 English translation of Disgaea: Hour of Darkness. It was not present in any subsequent versions (PlayStation Portable, etc.). This song is by a band (now separated) called Tsunami Bomb. It plays during battles against Maderas, Priere and Baal.

Atlus simply secured the rights to use the song during localization, and it is not part of the original soundtrack or connected to Disgaea's composer, Tenpei Sato.
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Enemy inside of me!

I'm caught! I cannot kick them out
Their claws are wrapped around my throat and they are squeezing tighter
Insanity is coming over me
Their every wish is my command
No way out!

I feed them, you will too!
They're gonna take control of you!
You'll know when they have got you trapped
Everything looks cloudy and you feel like you're on fire
Inhabited, I wish that I were dead
My blood has turned from red to black
No way out!

When they come for you
They see right through your flesh and bones for soon you'll be their home
They know you deep inside, the things you can't try to hide
No hope after the first bite

Look out 'cause they are onto you
They'll cut you open, crawl inside and you'll be lost forever
Don't try to run 'cause you're the chosen one
Your world is gone, no turning back
No way out!