Danganronpa is a Japanese mystery franchise that began as a visual novel game before expanding into anime and games, built around students trapped in trials where truth and deception decide who survives. In that setting, a denial like uso dayo carries extra weight, because calling out a lie can change the outcome of a trial. The short line has since travelled beyond the games through anime edits, reaction videos and soundboards, where fans reuse it whenever a claim needs to be challenged. Its brevity and clear meaning keep it useful even for viewers who do not know the original series.