Thanks for everyone's help! I think I'm done almost all of the major content in the game now, but there's still one message in the slum teller and I have no clue what it's referring to; anyone have any ideas?
"I see an excited girl in a bandanna, tied up in a dark room, in front of a small catgirl...".
EDIT: "Feed the Slime Orb" and "Train Gin" are still left in the Logbook. I suppose I'll just need to keep going with those ones slowly until something happens.