Drowning deep in my see of loathing

Broken your servant I kneel

It seems what's left of my human side is changing

Is slowly changing in me

Inuyasha tried to hold back his rising youkai blood, but he couldn't. The tetsaiga was broken, kagome was dieing if not already dead, and naraku was standing before him chuckling because this was all too amusing to him.

Looking at my own reflection

When suddenly it changes

Violently it changes

Oh no, there is no turning back now

You've woken up the demon in me

Suddenly, with a shrill cry, inuyasha lept into the air and began to tear naraku apart. Even after naraku was dead and he was sure he still couldn't stop. He turned to find sango, miroku, and shippou hovering over kagome's now lifeless body. That was it. That was the last straw. Kagome was dead. The one person who would accept him for him, the one whom he loved and she was dead. That's when he lost it. And he went on a rampage that left all of his friends dead and he still wasn't finished.

I can see inside you the sickness is rising

Don't try to deny what you feel

It seems that all that was good has died

And is decaying in me

There was nothing left for him. He continued his rampage jumping from village to village killing all that go in his way. The inuyasha that kagome loved was dead. He died when she did. His kind heart was replaced by a burning desire to smell and taste the blood of a fresh kill.

It seems you're having some trouble

In dealing with these changes

Living with these changes The world is a scary place

Now that you've woken up the demon in me

Once his youkai blood was awakened there was no suppressing it. Not anymore. And he continued on like that, a mindless killing machine, until he too died.