Tuturu comes from Steins;Gate, the visual novel released in 2009 and adapted into an anime in 2011, where Mayuri Shiina uses it as her signature hello. Voiced in Japanese by Kana Hanazawa, the line became one of the series most recognisable sounds among anime fans. Clips spread through forums, AMVs, and soundboards as fans isolated the greeting from episodes, and it later found a second life in memes, streams, and short videos where a cute, innocent entrance was needed without any context from the show itself.