No single viral source is confidently attached to this clip, so it circulates mainly as a short, reusable school-themed sound rather than as a quote from a known show or film. That flexibility is part of its appeal online: creators searching for a Korean school sound can drop the same eighteen-second clip into memes, reaction videos, and study content without needing the original context. Over time, its repeated use in classroom and exam edits has made the sound itself the reference point, familiar to viewers who recognise the school setting instantly.