After recently releasing some 'day' versions teaser images of Gugudan's Mina, Mimi, and Sally, they have now unveiled the 'night' version as well.

Compared to the 'day' version teaser images in which the members were highlighted with rays of sunlight, the 'night' version showcases the three members in a much more darker and fierce way. All three are wearing a matching black outfit from head to toe. Check out all the images below.

SEE ALSO: Brian reveals the reason he is still single at 43

Gugudan will be making their comeback on January 31 KST with their 2nd single album 'Act. 4 - Cait Sith' and its title track, "The Boots".