My Deer Friend Nokotan is a 2024 anime comedy adapted from Oshioshio's manga, whose Japanese title is Shikanoko Nokonoko Koshitantan. Its opening theme Shikairo Days turned the title phrase into a viral chant in summer 2024, spreading through dance covers, loops and edits on short video platforms. The repeated syllables and the series' deer girl Nokotan made the hook instantly recognisable even to viewers who had never seen an episode, and it remains a shorthand for hyper, deer-themed anime humour online.