at the
Tokyo Dome (pictured). In March 2023, the comedy duo
Audrey announced that they would perform at the
Tokyo Dome. Guest appearing on the duo's
All Night Nippon radio program in September,
Gen Hoshino was offered by the group to write the performance's theme song, which he reportedly enthusiastically accepted on the spot. In writing, Hoshino wished to create a theme song that would feel as Audrey in song. After trying to materialize his personal impression of the duo, Hoshino summarized Audrey in one word as ; "poppy" and simultaneously "anarchy". Hoshino first
programmed a demo of the song on his own, before showing it to his band members and then recording it on the fly. He likened this production process to his EP
Lighthouse (2023), consisting of songs he had written for
the talk show of the same name, co-hosted by Hoshino with Audrey's Wakabayashi. Shortly before beginning writing, Hoshino went for lunch with Wakabayashi, where he heard about him and Kasuga talking for long periods of time on phone when they were students, in a way similar to their present radio work; the story inspired Hoshino to make the theme song representative of the duo's friendship and history, rather than of the Tokyo Dome event specifically. Hoshino wrote "Odd Couple" wishing to showcase Wakabayashi and Kasuga's closeness while still remaining accessible in showcasing friendship to listeners unfamiliar with the group. He found lyrical inspiration in direct interactions with the duo, and would also note his conversations on
Lighthouse as influential to some degree, though they did not converse about Audrey. Musically, Hoshino began by writing the song's intro, which he described as "weird", with key changes in unexpected locations and without proper connection to the chorus. He thought the arrangement would fit Audrey, whose image he described as "bright and fun, but with a negative and mad side." == Promotion and release ==