Rainbow members Goo Woori and Jo Hyun Young knocked out backstage.

On the afternoon of 31st, Jo Hyun Young posted on her Twitter "I'm so thankful to all the fans who came tonight and I love you all. I will continue to fight on," along with a photo.

In the revealed photo are Goo Woori and Jo Hyung Young fallen asleep on the couch. The mysterious photo is making the fans smile.

Those who saw the photo commented "They even sleep cutely," "Must have been tired," "I like your new song," and "Cuties."