At midnight on September 21, GHOST9 began its debut countdown by presenting the music video teaser for the title track "Think of Dawn" of its debut album "PRE EPISODE 1: DOOR" on its official YouTube channel.

In the released video, each member's welcome intersects, starting with GHOST9 proudly walking out of the long red passage.

In particular, GHOST9 expressed the team's identity with its mysterious atmosphere combined with space reminiscent of SF movies such as white sand, burning fire, and iron passage, marking the beginning of the vast world view that GHOST9 will unfold in the future.