"Every single note has clearly been refined to be more sophisticated than it was back then, but I actually preferred the song I heard before," she said. "Even if it was a bit rough and clumsy, it felt fresh back then. I kept wondering what it would have been like if that song had been released then, and if our relationship would have been different." Kang Si-woo stated, "People say timing is important, but right now, perfection comes first." In response, Cha Ji-yoon asked if she could do it her own way and said she would perform "Sunshine."