Ah, another double entendre, à la Tuesday's prompt. (My French is really coming along, don't you think?)
There's a lot going on here, so let's take a moment to deconstruct this a little.
You see, sometimes, a person can see past all your layers and defenses and know immediately what you're about. We call this "seeing through" someone.
But sometimes, sometimes, a person can look at you and see nothing. As if you were not even there. And that's called "looking through" someone.
"Seeing" and "looking" are synonyms, and yet, in this context, they could not be expressing something more different. Let's... hoo boy. Let's just let this settle in. Wow, you know?
The completed story can be found here!