The girls started off their stage with "I Don't Know," which was the debut track they released back in 2011. A Pink relayed that they chose this song because it is a good song and they want it to be more known by the public as it wasn't too successful when it first came out. Hayoung joked, "Just like the title, no one knows this song."
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When MC Yoo Hee Yeol commented, "Nowadays, there are many idols who debut with a youthful concept, so do you feel like your position [as youthful idols in K-Pop] has changed?" Eunji answered, "It feels good to see that there are many groups that debut with a concept similar to ours."
The girls also revealed that they cried when they first heard "Only One," saying, "There was some emotional turbulence as we waited for our comeback. When we first heard ['Only One'], we cried because we thought, 'This is it.'" Eunji, on the other hand, was there to capture the moment with her camera, joking, "I just filmed the members crying."