Tuturu is the signature catchphrase of Mayuri Shiina, the cheerful childhood friend in Steins;Gate, the science-fiction anime that first aired in 2011 after the 2009 visual novel. She uses the made-up greeting in place of hello, and its bright, sing-song delivery quickly made it one of the show's most quoted lines. Anime fans clipped it for reaction videos, memes, edits and soundboards, where the short length and instantly recognisable tone made it easy to reuse. This Beya variation keeps that playful spirit while adding a softer, cuter ending.