S.I.S. Hangul 에스아이에스 Was A Six-Member Girl Group Under XX Entertainment. They Debuted On August 25 2017 With Their First Single "I've Got A Feeling". Their Name Stands For "Serendipity In Stars". They Unofficially Disbanded Sometime Around March 2021 Without Any Announcements. The Group Consists Of Members J-Sun Dal Minzy Anne Sebin & Gaeul.