Can anyone explain the ending of "Koe no Katachi" one-shot?
It says "you-me-friend" in JSL. The pronouns appear to be the same as ASL, (finger pointing at the relevant person stands in for you/me/he/she/it) and clasped hands by context appears to mean friend. In ASL, it would be hooked index fingers &amp; clasped hands means "to congratulate".

I didn't see any other panels with likely sign in them.  On an unrelated side note, JSL is distinctive for it's usage of air-writing, where some signs like place names are the Kanji written in the air with your finger.