An eraser

Today, I'd try to describe an eraser.
Because I'm not good at describing things.
To me, unintended writing will be better.
I can write how I feel or how I think.
But in the case that I have to describe a subject, I'll get confused.
Appropriate words don't come up in my mind.Somehow I have to try.

I found an eraser which became discolored.
I didn't thought that it worked well.
But I didn't have another choice, I used it.
To my surprise, it works perfectly!
I have to regard a mono properly.
Mono is the brand of the eraser.

I wanna sleep! Good night!