The drama club event pops up after your morning event with your familiar. Just head to the school Saturday morning after that. As for the 4 new girls I'm still clueless, and not sure if there actually was anything in this update for them. Pretty sure what it meant by "will appear" is that maybe they will have content in the near future? But since people are mentioning names such as "Vivien" which I can't seem to find anywhere I'm assuming there's something we're missing. Idk, would really appreciate it if the devs would shed some light on the subject.
Viewing post in Peerless Lust update 0.31 Public Release comments
Pretty Simple there are 2 New Events arround Shuya the first 1 where you meat 4 new Girls which sit arround a Table with Shuya and talk about somethink.... These 4 are pretty sure the 4 new conquerable girls in a later patch... Vivien however is Part of the second Shuya event after the first one.... I dont want to spoil more but there is your light on the subject