Because you

What are they? They laugh too much. They are still children. And I don't care about them.

What are they? Imagination? I know you have imaginations. But, COULDN'T YOU SEPARATE ABOUT IMAGINATION AND REALITY??? This is for our score!!!!

I am too tired to sit alone and watch you all. I am sure after the school finish, I got headache and depression.

I'm sure. And it's because I'm not allowed to become one of you.