The theme of Thirst NO.1

I think that the theme of the book "Thirst NO.1" is about how just because you live for a long time, it doesn't mean that you can't make the same mistakes as before. Another thing that I think that is the theme of the book is that love can be hard to find, and hard to get, but then love can be either given or taken away, and of how love can be the thing that can cause you to break down after you loose that loved person.