For this ending I will write exactly what choices I made and where, if when you are playing through you get to a choice that isn't listed below, it's because it didn't matter to the outcome for the trophy so I left it out.
*** Spoiler - click to reveal ***Lesson Choice: I always used MATHS CLASS
[04/11] Join the infirmary staff.
[04/15] Neaten the desk.
[04/21] Talk to Kazuaki
[05/21] Go to the first-aid tent.
[06/22] Go to the infirmary.
[06/22] Hear your voice.
[07/07] Rule the world from the shadows.
[07/07] No thank you.
[07/13] I was in my classroom.
[07/20] Missing students
[07/24] Forget it.
[08/06] Invite Shuu.
[08/14] Ask what he's doing.
[08/30] Return to my glorious abode.
[09/03] It's suspicious, so destroy it
[10/10] Contact the stalker bird first.
[02/02] Bitter Black Bean.