2021年发行首张单曲专辑的Blue whale 感性很好的融入了其中 表现了 随着新春一起绽放的青春们的激动和告白的真实心情。 代表曲4月作为钢琴版本一起收录，在钢琴旋律的美丽和歌手的声音中让人更加 沉浸。 ■ Credit Composed by 블루웨일 Lylics by 블루웨일 Arranged by 강유 Recorded by 강진철 Mixed by 강진철 Mastered by 강진철 Album designed by 여임경