The audio comes from Haikyuu, the volleyball anime following Karasuno High School, and features its tall, glasses-wearing middle blocker Tsukishima Kei. Fans lifted the short line from the show and reused it as a standalone reaction sound, sharing it through anime edits, short-form videos and soundboard collections. Its appeal comes from how instantly recognisable Tsukishima is to Haikyuu viewers, and how easily the line fits moments of teasing, sarcasm or playful blame. Because the phrase is short and the delivery is so distinctive, it continues to appear in new edits long after viewers first heard it in the series.