Wallflower...

U said "I think to u when listening to 'world behind my wall' song"
If so, in that world, what am I?

I'm not big enough like a world.
I'm not such a vast land.
I don't deep enough chasms like the sky.
I am also not floating clouds.
........

Perhaps I'm just wallflower. It's only separated by a wall with your outside world. It's always sticking on the wall. It's very close to your outside world but never belonged to that world. Its location is behind your wall.
........

The first time listening to 'Wallflower', this wordless song, I understood that. I'm originally black peony. But own with u, I just wallflower...