2018年发行数字单曲'下雪的日子'后 2021年秋天，歌手南允瑞以正规1辑'Knots Of Love'回归了 以唱出相遇和分手的缘分的叙事曲《是爱情吗》为首，Bossanova《再次》、清爽的中速曲《雨中两人》、单曲1辑中收录的《下雪的日子》等.. 收录easy listening歌曲的，歌手南允瑞独具魅力的沙哑嗓音的《Knots Of Love》.. 今后她的行踪备受关注。 ■ Credit All songs written & arranged by Biting Duck Produced by Biting Duck Guitar by 함춘호 (사랑인가, 다시, 빗속을 둘이서) 홍석현 (눈이 내리는 날) Chorus by 남윤서 Mixed by 김근채 (Punktire studio), Biting Duck Mastered by 전훈 (Sonic Korea)