The group consists of 6 members - Jihae, Dal, Minji, Ann, Sebin, and Gaeul. Their debut concept will be that of a 'little sister' girl group, with 'Produce 101' season 2's Kwon Hyun Bin appearing in their debut title MV!

S.I.S's debut is set for this August 25 at noon KST with their 1st single album, 'I Can Feel It' (literal translation). S.I.S stands for 'Serendipity in Stars', meaning unexpected delight found in the 6 stars, or the members of S.I.S, as well as being the shortened version of 'Sister'. 

Meanwhile, S.I.S have been teasing fans with individual introductory clips of each of the members. You can check out the latest introductory video featuring Ann below.