The exact source behind Meisui CM is not clearly documented, so it circulates as a short, obscure soundboard clip rather than a widely recognised scene or song. Its Japanese tag suggests it travelled through online sharing and meme-style reposting, where brief, hard-to-place audio often gains a second life precisely because it sounds unfamiliar. That obscurity is part of its appeal: creators can reuse it as a neutral reaction or transition without viewers bringing a strong association from a film, show, or viral moment, keeping it flexible for small edits and streams.