The lyrics were written by Kana Yaginuma and the music was composed by Yūki Waga under the music label Lantis.[1][2]
In an interview, Waga explained that while writing the song, he walked around the house repeating the phrase Shikanoko nokonoko koshitantan at every speed and rhythm that he was required to by Lantis and Twin Engine to create an "earworm" song for the anime.[3]
Promotion
On June 22, 2024, ABEMA, the streaming service that streamed My Deer Friend Nokotan, broadcast a 24-hour endurance video promoting both the song and the anime.[4]
Release
The song was released on July 8, 2024, as the opening theme of the anime My Deer Friend Nokotan. It was performed by Shika-bu, consisting of Megumi Han as Nokotan, Saki Fujita as Koshitan, Rui Tanabe as Anko Koshi, and Fūka Izumi as Meme Bashame.[5][6] On September 18, 2024, after the show aired it's final episode, the official music video was released on Twin Engine's official channel.[7]
Reception
"Shikairo Days" debuted at number two on the Oricon Digital Singles Chart for the issue date of July 22, 2024, gaining 8,618 downloads in the first week.[8] The CD single debuted at number 32 on the Oricon Singles Chart for the issue date of September 9, 2024, selling 1,843 copies.[9] It also charted at number 47 on Billboard Japan's Hot 100 chart, and ranked 1st on Heatseekers Songs.[10] It was placed 2nd in the TikTok Weekly ratings on its debut,[11] and reached 1st place on iTunes Japan on its debut.[12]
Popularity
The song become a viralmeme on YouTube and TikTok after the official YouTube channel of Twin Engine released a 1-hour endurance video featuring Koshitan dancing in front of a deer on loop — which is an excerpt of the scene in episode 3 of the anime — on May 28, 2024 for the promotion of My Deer Friend Nokotan.[13][14] It is often described by fans as "brainrot".[15]