On December 20, 2023, Creepy Nuts announced that they would be in charge of the theme song for 2024 television series Extremely Inappropriate!, titled "Nidone".

[3] Subsequently, it was released alongside "Bling-Bang-Bang-Born" as a double A-side CD single on March 20.

[4] Daiki Kamoshita directed the music video for "Nidone" with the theme of "wind of the times and trends", premiered on March 29.

[5] A Jersey club track,[6] "Nidone" was written for "dedication to the people of the Reiwa era who live in fear of the ever–changing 'righteousness' bound by compliance," according to the press release.

plot, contrasting between the Showa and Reiwa eras while making references to various aspects of the Japanese folklore like Urashima Tarō, Momotarō/Onigashima, and Hanasaka Jiisan.