Released as a digital single on September 24, 2022, by P Nation through Dreamus, the song is Crush's first project since completing his mandatory military service in August.

An accompanying music video was released the same day as the single and shows Crush and J-Hope singing the song and performing choreography together with a group of dancers in an alleyway and on the street.

Sung in both Korean and English, "Rush Hour" is a "jazzy",[1] "Nineties vibe-filled",[2] "funk and soul track"[3] with a "groovy hip hop instrumental"[4] written by Crush, J-Hope, and Penomeco.

[7] On September 6, 2022, Crush's label P Nation made a "Coming Up Next" post on its social media featuring a close-up photo of the singer's face styled as an AirDrop request.

[8] The following day, a moving poster of Crush in the driver's seat of a car, turning to stare into the camera as horns blare loudly in the background, was shared online, with "Rush Hour" and "2022.9.22 6PM KST" displayed on the lower half of the visual.

News media revealed that "Rush Hour" was the title of the singer's upcoming single slated for release on various music platforms at the time and date shown in the poster.

[9] A "Jacket Mood" teaser, similar in design to a lookbook, showcasing collages of various outfits, shoes and accessories for the singer, was released on September 13.

Crush's first single in two years since enlisting to fulfill his mandatory military service, "Rush Hour" was released as scheduled on September 22, 2022.

The end of the clip revealed J-Hope of BTS as the featured artist on the track when his name appeared onscreen below the single's title.

[4][14] The second teaser, released the following day, showed two men from afar with their backs to the camera, leaning against a parked car outside a coffee shop.

[17] Shot in a "big-city setting filled with yellow taxi cars, graffiti painted walls, scaffold-littered side streets and abandoned bus stops",[1] the music video premiered on Crush's YouTube channel simultaneously alongside the single's release on September 22.