Park Soo-ah (former member of After School under the name Lizzy) gave an interview in which she referred to Kaeun "preparing her new girl group."
"(Talking about Afterschool) Nana, and Jooyeon, everyone became an actress, Raina is also doing well preparing for her solo. And Gaeun is also preparing her new girl group"
Meanwhile, Pristin's Kyulkyung has been working on solo projects lately. (edited to remove joke about Kyla, I promise it was not shade -op)