SECRET NUMBER's Soodam and Zuu are the group's last members up to reveal a set of glaring red teaser photos, continuing to hint at their comeback.

The ladies of SECRET NUMBER will be returning next month on June 8 at 6 PM KST with their 4th single. The group has yet to reveal specific details regarding the upcoming single, aside from the recent series of individual member concept photos, which all share the common theme of the color red. 

Stay tuned for more of SECRET NUMBER's comeback teasers, coming up throughout this month.