Ga In stole the hearts of her listeners with her innocent voice.

"Nostalgia" was released on the 30th to thank her fans for their support, and it rose quickly to the top of the charts, showing her place as a powerful female soloist. The song talks about the emotions that start with a fateful first meeting. Though it's a remake by Brown Classic that was released in 2008, "Nostalgia" has a completely different charm than the original.

The song has been gaining much praise from listeners because it's sung in a completely different way than Ga In's title song "Bloom", and Ga In has managed to give a completely different flavor to the follow-up track.

LOEN Entertainment commented, "Thank you so much for the interest and encouragement of Ga In's surprise digital single. Please show Ga In unchanging support."