Ryan Jhun will be producing the girls' comeback song. He's worked with them before on "Nothing Lasts", and now, 7 years later, he's working with them again for their newest song. He said, "I worked even harder since it's our first meeting in 7 years. 7 years ago when they debuted, they were made fun of, but I saw their talent. Girl's Day is at the top now. It's a completely different place. Thinking about that time is weird. I gave them about 4 songs. I suggested a new direction for Girl's Day, and they followed well."

SEE ALSO: Lee Min Ho reveals he was a victim of a drunk driving accident and spent nearly 1 year in the hospital

He added, "They can get #1. They definitely will. I know people say don't get your expectations high, but I think those expectations will be fulfilled. It's a song Girl's Day will breathe together with the listeners. It's not a song anyone can do. It's a song only Girl's Day can do, but it's a luxury song that can be easily hummed to. It's also a girl-crush concept."

Are you excited for their comeback yet?