Tuturu comes from Steins;Gate, the visual novel later adapted into a 2011 anime series, where it is the signature greeting of Mayuri Shiina, a close friend of protagonist Rintaro Okabe. Her cheerful delivery made the phrase inseparable from the character, and fans began isolating it in clips, remixes and reaction posts. As Steins;Gate spread internationally, the short vocal sting travelled beyond anime fandom into general meme use, where it now works as a friendly hello, a cute punctuation mark, or an ironic contrast in edits.