The album consists of ten tracks in total, including the lead single, "Unending Days".

On October 28, 2024, Antenna announced that Kyuhyun would release his first full-length album on his tenth year solo debut anniversary.

[3] Starting from November 12, 2024, Kyuhyun dropped the concept photos for his album, including calmness, maturity,[4] yourself and keynote version.

On November 24, the music video teaser of the title track, "Unending Days" was released.

[2] The tour would start in Seoul, South Korea from December 20 to December 22, 2024, with the tour set to continue through to April 2025, in other Asian countries such as Japan, Hong Kong, Taiwan, Indonesia, Thailand and the Philippines.