Kasane Teto first appeared in 2008 as a Japanese voice synthesis character created for the UTAU software, originally presented as a joke rival to Vocaloid singers. Her red twin-drill design and synthesized singing voice built a lasting fan following through songs, fan art and short videos. This get out line circulates separately as a reaction sound on soundboards and in edited clips, where fans pair Teto's recognizable voice with everyday annoyances. Its brevity and clear wording keep it reusable across anime edits and general meme contexts online today.