As I recall.. Red Hair.. go to school roft top, wearing the school uniform.
Guitar.. go to lab(1st floor?) where you get fire extinguisher. There are door connected to test object pathway. Use potion effect there. you will go to somewhere wondering zombies.. Guitar is in there.
Black Hole.. You can go to universe randomly when you get out in the UFO. Black hole is in there.
I think that I'm too late.. but I hope this will be of help to you.