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"Fluttering Heart" is by producer Kim Ji Soo and expresses Min Suk (Seo In Guk)'s heart towards Soo Young (Lee Ha Na). With this, Honey-G croon another love song with their soft and tender voices, and like the song's title, they left listeners feeling the butterflies in their stomachs from the nervous excitement of romance expressed in the song.

Feel the love in the air through the song!