There was a boy you used to bully in elementary school.

Koe Chinmoku.

He was deaf. He even wore hearing aids.

You were an immature little whippersnapper and messed with him.

Throwing his hearing aids away, mocking him, taking advantage of his deafness, etc.

Now.. you're a highschooler..

..and there he was...in your class..

He suddenly looked at you.

And...smiled..

He waved politely.

Why would he smile and wave after everything you've done?