Tuturu comes from Steins;Gate, first released as a visual novel in 2009 and adapted into an anime in 2011. It is the cheerful greeting of Mayuri Shiina, the kind-hearted friend of protagonist Rintaro Okabe, voiced in Japanese by Kana Hanazawa. Fans clipped the line as a standalone Tuturu sound and shared it across forums, videos and soundboards, where its length and repetition made extended versions popular. It remains widely used because the greeting is short, distinctive and instantly signals a friendly anime reference without needing any context from the series itself.