The second sub unit is call AFTER SCHOOL ORIGINALS.
This sub unit will consist of: Kahi, Jungah, Jooyeon, Raina and Nana.
The first mini album will be released in either September or October. They re-recorded the songs they already had – - Nana will take over Bekah parts in rapping. They should have promotional activities in South Korea since it will be a mini album.
There will be two title songs and they were all recorded without Bekah. One is hiphop, and the other one is a softer kind of track. There will be three MVs. Bekah’s solo song will be a digital single. (May be included on the mini album)

However it’s all not confirmed.
Source: MissKahi via AfterSchool Daze