TXT consists of Taehyun, Soobin, Heuningkai, Beomgyu and Yeonjun. Minisode 1: Blue Hour will mark the group's first release since the EP The Dream Chapter: Eternity, released in May.

TXT first released the music video for “Blue Hour” on October 26, 2020 at 6 p.m. KST, meaning that it took the video four years, one month, and 21 days to reach the milestone.

Released on October 26, 2020 at 6 p.m. KST, TXT’s “Blue Hour” music video surpassed 100 million views on May 26 at 11:12 a.m. KST. This means it took the video six months and 29 days to ...

The 18-year-old singer wears an all-white outfit. TXT shared a teaser for Blue Hour featuring Soobin on Tuesday. The video shows Soobin reading a book while lounging in a tree with autumn foliage.