The album consists of 10 tracks, including the lead single "Check Pattern".

In June 2024, Sungjin performed "Wednesday Night", one of the track from his solo album, on their third fanmeeting, "I Need My Day".

[1] On October 16, 2024, it was announced that Sungjin would release his first full-length solo album on November 5, 2024.

[2] He dropped a cinematic film, in which it showed his travel through 30 seconds, 30 minutes, 30 days and 30 weeks along with his narration, on October 17, 2024.

[10] On November 8–10, 2024, Sungjin held his first solo concert with the same name as his album, 30, at Kwangwoon University.