
S.I.S [Serendipity In Stars] (에스아이에스)
- Debut (Y-M-D): 17-05-25
- Disbanded: c.2021
- Label: XX Entertainment
- Music Videos:
- Korean MVs: I’ve Got A Feeling (느낌이 와), Say Yes (응), Always Be Your Girl (너의 소녀가 되어줄게), Don’t Wait (기다리지 말아요)
- Albums:
- Korean: I’ve Got A Feeling [Single], Say Yes [Single], Always Be Your Girl [Single], Don’t Wait [Single]
- Fan Name: Mily (밀리)
- Logo:

Members:

INACTIVE
- Stage Name (Hangul): Minzy (민지)
- Position: Rap, Dance, Vocal
- Real Name: Choi Minji (최민지)
- Birthday (Y-M-D): 97-02-02
- Nationality: Korean
- Height: 162cm
- Blood Type: A

- Stage Name (Hangul): Gaeul (가을)
- Position: Vocal
- Real Name: Choi Moonjoo (최문주)
- Birthday (Y-M-D): 98-08-12
- Nationality: Korean
- Height: 167cm
- Blood Type: A

- Stage Name (Hangul): Anne (앤)
- Position: Dance, Vocal
- Real Name: Kim Seungyeon (김승연)
- Birthday (Y-M-D): 00-05-03
- Nationality: Korean
- Height: 162cm
- Blood Type: O

- Stage Name (Hangul): Sebin (세빈)
- Position: Vocal, Maknae
- Real Name: Lee Sebin (이세빈)
- Birthday (Y-M-D): 01-07-02
- Nationality: Korean
- Height: 160cm
- Blood Type: B
Former Members:

