P.S: This will definitely spoil the game for you so use it at your own risk. Don't flame me saying that I'm an asshole spoiler and should be burned alive. It's not my f***ing fault you are reading this worthless guide anyway.
"Her" Ending (a.k.a The Stalker/Black Haired Girl)
-I vote for ice cream too.
-Head for the cafeteria.
-Yes.
-I don't want to talk about it.
-I'm in.
==========================
Hooded Girl Ending (a.k.a BDSM freak)
-I vote for ice cream too.
-Head for the cafeteria.
-Yes.
-I don't want to talk about it.
-I can't.
==========================
PX3 Game Ending
-I vote for ice cream too.
-Head for the cafeteria.
-Yup. You need something?
-Do I know you?
-I'm in.
=========================
Carmine's Ending
-I vote for ice cream too.
-Head for the cafeteria
-Baby, if I'm gonna fool around the alphabet, I'll put U and...
-I don't want to talk about it.
-I can't.
==========================
Iris's Ending
-Finish it early.
-Head for the cafeteria.
-Yes.
-I don't want to talk about it.
-I can't.
==========================
Amethyst's Ending
-Finish it early.
-Follow Cerise.
-Yes.
-Nice to meet a fellow fan. The name is Ceil.
-I'm in.
-Go to the corridor where the teacher's lounge is.
==========================
Mikado's Ending
-Finish it early.
-Follow Cerise.
-Yes.
-Nice to meet a fellow fan. The name is Ceil.
-I'm in.
-Go back to the classroom.
==========================
Chamiosee's Ending (Sad)
-Finish it early.
-Follow Cerise.
-Yes.
-Nice to meet a fellow fan. The name is Ceil.
-No thanks.
-Give her some space. I'm sure she's not going to talk to us.
==========================
Cerise's Ending
-Finish it early.
-Follow Cerise.
-Yes.
-Nice to meet a fellow fan. The name is Ceil.
-No thanks.
-Something is definitely wrong. Let's follow her.
-Go to the corridor where I've never been to.
==========================
Cerise's Younger Sister Ending
-Finish it early.
-Follow Cerise.
-Yes.
-Nice to meet a fellow fan. The name is Ceil.
-No thanks.
-Something is definitely wrong. Let's follow her.
-Go to the corridor where you saw her last time with her sister.
==========================
Chamiosee's Ending (Yaoi)
-Finish it early.
-Follow Cerise.
-Yup. You need something?
-Nice to meet a fellow fan. The name is Ceil.
-No thanks.
-Give her some space. I'm sure she's not going to talk to us.
==========================
Amy & Iris's Ending (Yuri)
-Finish it early.
-Follow Cerise.
-Yup. You need something?
-My name is Ceil. You must be a huge fan of Iris.
-I'm in.
-Go to the corridor where the teacher's lounge is.
==========================
Janitor Easter Egg (to unlock addtional extra)
-Finish it early.
-Follow Cerise.
-Yup. You need something?
-My name is Ceil. You must be a huge fan of Iris.
-No thanks.
-Something is definitely wrong. Let's follow her.
-Go to the cafeteria.
-Mike Inel.
==========================
Go home
-Finish it early.
-Follow Cerise.
-Yes.
-Nice to meet a fellow fan. The name is Ceil.
-I'm in.
-Go to the nearest corridor.
[SPOILER!!!] The hooded girl is not the stalker. Mr. Mike Inel pointed that out in his dA. She is none other than the teacher! There too many hints pointing to her including the penmanship of the letter and the way she disciplines her student. Another thing is that she calls herself a lady not a girl. Hence, she is the badass smexy teacher of theirs. Wish I had someone like her during my college days. I bet my attendance would always be perfect. :))[/SPOILER!!!]