Kiss kara Hajimeru Egoism

Is this ego or just a bug?"
When I woke up, I didn't feel anything. Like the other sisters, I was simply fulfilling my assigned role. To fulfill that role was supposed to be proof of one's existence. I don't want to do that, I can't prove my existence. A glitch. In other words, I thought my existence was a bug.
But you called such a bug an ego. I think it was by chance. I know it didn't mean anything.
But still.
Since you called me that My bug became ego, and ego became shining memory.

Japanese Version