Im stuck trying to talk to all the girls about why they chose you, I managed to get sami's easily but the rest i have no idea, Could i try and get some help?
You can find Cassidy's journal by talking to Jenny when she's alone in the garden/by the tree. I don't exactly know how to trigger it since these paths involving investigation aren't laid out in the event logs, but I assume it's triggered by starting the investigation. When you talk to Jenny about it, choose to keep the journal.