On April 16, 2021, the group's label WM Entertainment announced that Oh My Girl would be releasing a new EP the following month.

The teasers feature each group member dressed in denims, holding transparent umbrellas against a rainy backdrop.

The teasers show the members dressed in floral printed outfits, against the backdrop of sofas and curtains.

[23] The video features Oh My Girl dancing to the track on an open green field and has a sci-fi-inspired theme.

[25] "Quest" is a trap-style song characterized by bouncing instrumental elements, 808 drums, 8-bit synth effects, and multiple vocal changes.

[16][25] It was produced by Ryan S. Jhun, Jeppe London Bilsby, and Lauritz Emil Christiansen, with lyrics co-written by member Mimi.

[25] "Invitation" is a bossa nova song featuring an electric guitar over a trap-style beat.

[25] On May 10, Oh My Girl held an online comeback showcase where they performed songs from the album for the first time.