Written by Ayase, the song is a theme for 2023 Universal Studios Japan's campaign Unibaru, based on Nagi's short story Lens Goshi no Kirameki o.

[5] Three days later, Yoasobi revealed the cover artwork and the teaser video for "Adventure", announcing to be available for digital music and streaming platforms on February 15.

[7] The teaser video shows Ikura's voice reading passages from the based stories in front of the blurred background of the theme park.

"[12] Musically, "Adventure" contains acoustic guitar intro and "colorful" synth,[13] depicting the main character stepping into a special place and freeing their mind and body.

The story of the music video is creative director Rei Hanada's idea after her first listening to the song, and imagining a scene of "a girl walking around Universal Studios Japan and dancing with her heart pumping.

[18] The video begins with animation of a girl walking and starting to dance in the "low degree of freedom" background with "limited-color flat horizontal scrolling like a retro game."

When the girl runs through the gate, the background is changed to inside Universal Studios Japan at night and she continuously dances, including at the square and the restaurant.