The girls can be seen smiling brightly dressed in pure white attire in the two photos.
In addition, each member also opened up official Instagram accounts in order to interact with fans.
You can follow the accounts individually here:
Chaekyung - https://www.instagram.com/yunvely_0824/ (This account already existed).
Chaewon - https://www.instagram.com/chaeni_0824/
Stay tuned for more teasers until the full release of 'Eternity' on September 20.