This time, the girls can be seen smiling brightly in front of the camera, wearing floral-printed dresses.

SEE ALSO: Chuu reveals secret messages in 'Pink Cloud' MV

The caption read, "The secret door has opened," leading to much anticipation. They also revealed that Kim Lip will be featured on the title track and several LOO?? members will appear in the music video. Additionally, another new sub-unit might be released as well. They wrote, "11th member of LOO??, Go Won appears. Starting with the introduction of HeeJin, LOO?? has been introducing new members for more than a year now to create its own universe. LOO?? once again introduces a new member, Go Won. The introduction of Go Won was teased as with blonde hair and black hair as if she was two different person from whole different worlds, making the fans look forward to another expansion in the Loonaverse. The music video of the titled track features several members of LOO?? to connect each others' units and foreshadow the possibility of a new unit with hidden hints to spark up the expectations. The track features Kim Lip of LOO?? / ODD EYE CIRCLE, resulting in more musical lavishness. Just one last member to go, LOO?? has sold out the tickets to 'LOO?? X Study Group' in just 50 seconds, proving its international attention even before in its complete form."

#????? #?? ? ???? [Go Won], [Chuu&Go Won]? ????? ?? ????? ???? ??? ?? ??! Go! Go! ??????? LOO??'s 11th member, #GoWon 's single [Go Won] and [Chuu&Go Won] are now available for pre-order Let's go to meet her! Go Go! ??????? http://cafe.daum.net/loonatheworld ??????? ??????? ??? ?? ? ??? ?? ??? ??. ??????? ? ?? ?? '??'? ?? ?? 1?? ?? ?? ?? ??? ???? ???? ???? ??? ??? ?? ?? ??? ??? ? ??? ?? '??'? ?? ??. ??????? ?? ?? ??? ??? ? ??? ? ??? ??? ? ??? ??? ??? ???? ??? ?? '??'? ? ?? ?? ?? ??? ??? ???? ???? ??. ??????? ??? ???? ???????? ??? ?? ???? ??? ??? ??? ???? ??? ??? ?? ???? ?? ??? ??? ?????? ??? ?? ??????? ?? '??'? ???? ?? ?? ? ???? ????. ??????? ??? ? ?? ??? ??? ???? ??? ??? ?? ??? ??? ?? ??? '??? ?? X ?????'? ??? 50??? ?? ??? ?? ??? ?? ??? ?? ? ?? ??? ???? ?? ??? ??? ??. ??????? ??????? 11th member of LOO??, Go Won appears. ??????? Starting with the introduction of HeeJin, LOO?? has been introducing new members for more than a year now to create its own universe. LOO?? once again introduces a new member, Go Won. ??????? The introduction of Go Won was teased as with blonde hair and black hair as if she was two different person from whole different worlds, making the fans look forward to another expansion in the Loonaverse. ??????? The music video of the titled track features several members of LOO?? to connect each others' units and foreshadow the possibility of a new unit with hidden hints to spark up the expectations. The track features Kim Lip of LOO?? / ODD EYE CIRCLE, resulting in more musical lavishness. ??????? Just one last member to go, LOO?? has sold out the tickets to 'LOO?? X Study Group' in just 50 seconds, proving its international attention even before in its complete form. ??????? #LOONA #? #Chuu

A post shared by Official LOO?? Instagram (@loonatheworld) on Jan 25, 2018 at 1:13am PST