In the quote posted, ayu talks about how two different feelings are present in the song. I think the title might represent that. kiss=affection, while kill=hatred.
Duality or - maybe better - contradiction is also present in the lyrics. For example:
Quote:
The more you pretend to be strong the more I see your weakness
The more you bare your fangs the more I see your pain
|
That's how I would see the title...