Happy Ending in Yandere Simulator 1980's mode!
This is the end cutscene, uncut, unedited.
I only used the befriend elimination method on all of the rivals. To achieve this ending:
~Do not skip the tutorial!
During the tutorial, go to the faculty room, you will see a blue telephone.
Dial this number: 75-067-5708
~Follow Fun Girl's instructions
Go to the gym and get balloons behind the stage (Behind the school)
Get Ammonium from the Science Lab (2nd Floor)
Go to the Workshop room (Near Science Lab)
Combine both items (Becomes stink bombs)
Throw it on Ui Tunesu (Red hair girl near Cooking Club room)
~Proceed to kill Sumire Saitozaki (Follow Tutorial)
If you get this right, you won't get Ryoba's typical dialogue whenever the week starts!
~You MUST NOT kill your RIVALS or ANY ONE
Use non-lethal elimination methods:
~Befriend
~Betray
~Bully (not sui*de)
~Expel
~Matchmake
~Reject
~Framing (only narc0*tics and not mur*der)
If you kill any one you will be greeted with a "Dead End"
ALSO
~Give senpai letters and gifts on his desk (MAX LANGUAGE FOR BETTER EFFECT)
~You must have 100 reputation
The "Happy Ending" you will only have 9 rivals! (No Detective and his Apprentice!!)