ok here's a walkthrough of the endings
(ending 0 = chose go to hospital no more choices after that because brother is alive )
(ending 1= chose make bed then chose 2nd choice next choice 1st choice and then chose 1st again)
(ending 2= follow the choices for the first ending but instead chose choice #2 at the end instead and you will get some more choices keep choosing yes that will get you this ending )
(ending 3 = this one is real simple just keep choosing the 1st choice for all of them and you will get this ending literally)
(memory= this give you the last cgs it unlocks only when you get all the endings it will appear in the main menu just click memory and play it no choices are needed )
I hope this helps because if not I don't know what to do I have all cgs unlocked and I simply did everything I just typed