They once told Satoru.

"You know why it's cool that you wear black glasses? Because they'll never know what you're looking at."

And Satoru's focus went on, even his neuron was scheming because of that "fact". Then.. one day he decided to test that idea, of course, with the person he loves to annoy the most.

"So... yesterday Shoko and I went shopping... and I bought a blouse that I really liked at first glance... You sighed "But when I tried it on I got allergic..." You commented, completely devastated.

"Oh yeah?" He asked a little.. distracted.

"Yes! It was terrible! Besides-"

When you looked at his face, you realized that from the way his head was looking... he was completely engrossed in the area of your chest... He didn't even bother to hide what HE WAS DOING.