This is a short guide with all the choices you need to make to get all the different endings.

Prologue (these don't matter too much)
I see a strange-looking kid...
No, I understood...
Alright...
I appreciate it.
I think so
You might be overthinking it...
Heart World
August 1st
You should at least knock
I'm not very good with directions...
Is black tea okay?
No need to go to any trouble
August 2nd
Will you buy me a cake, then?
Why would you ask that?
*Save 1*
I didn't want to go back to the hospital
What's with these injuries?
Did you apologize to my dad at the hospital?
A little bit
August 3rd
...Thanks for telling me
That sounds fine
No, I didn't mind...
You made me cry after my performance?
I don't want a lot of people to know
August 4th
Welcome back, Master
Have you decided, Master?
Yes, Master
Thanks for coming here even though you're busy
Welcome back, Master
August 5th
Are you here to pick me up?
Everyone helped me out
August 6th
Tell me more about the accident
So Shin came to find me?
Is Shin okay?
August 7th
Thank you, Toma
August 8th
Yes, I believe you
I was saved, thanks to you, Shin
August 9th
Were you searching for me as well?
August 10th
Sorry Toma, Shin and I were going to go out
This is kind of how I see you
Just... don't be too forceful
August 11th
Do... you want to see some fireworks today?
Would you be okay with it being so loud?
It's because you made the effort
August 13th
I'm very sorry
What's happening with Shin?
I was running in the dark and slipped
I was a bit embarrassed that he was so close
I don't know
I don't remember
No way
August 14th
That memory might not be of the accident
August 15th
Who searched for me that day?
...
August 16th
If it's alright, I would like to walk with Toma
Okay, just while we're eating...
*Save 2*
This isn't like you...
August 17th
I heard you lead the search
Was I conscious when you found me?
August 18th
Please tell me how to contact the owner
Go with Toma
Could I ask why?
August 19th
I really wanted to see you...
What kind of clue?
August 22nd
All options
It's okay, I've got it all
Shin, do you have a minute?
August 23rd
Yeah, it's fine
Was this what you were saying before?
I was just so happy to remember again...
Someone tried to help me
*Save 3*
Shin
Can I sleep next to you...?
Are you scared...?
August 24th
Okay...
Sorry, I'm coming
Were you in the band with me?
Toma
August 25th
Were we always together back then?
August 26th
I want to go see a movie
...It's a promise, okay?
I don't think I can sing like before
August 27th
That wasn't the case yesterday
-End-

*Load save 2*
But it's not troubling me
August 17th
I heard you lead the search
Is it true that Shin stayed back at the lodge?
August 18th
Please tell me how to contact the owner
Go with Toma
Could I ask why?
August 19th
Are you okay...?
But I was waiting for you to come back...
August 22nd
All options
It's okay, I've got it all
It won't take me very long...
August 23rd
Wouldn't it be better for us to go together?
What are you saying?
I just spaced out a bit from the memory...
I don't remember
Toma
August 24th
Why?
I'd actually rather just go home...
Shin, what is this?
Toma
August 26th
I want to go to a fancy cafe
...It's a promise, okay?
August 27th
That wasn't the case yesterday
-End-

*Load save 1*
August 2nd
I didn't know if I could trust you
What's with these injuries?
A memory just came back to me
I'm okay
August 3rd
Is this contact info real?
I don't really feel like walking
Yeah, I'm sorry...
I'm fine, I just remembered something...
I can't trust other people
August 4th
Welcome, dear customer
Welcome back, Master
Have you decided, Master?
I'll be back in just a moment
I'm sorry, you had more important things to do
Welcome, dear customer
August 5th
What happened with prep school?
Everyone helped me out
August 6th
Tell me more about the accident
I remember being found
But I'm sure it was Shin who found me
August 7th
Shin isn't at fault here
August 8th
I still need to think about it a bit more
I think your calmness is amazing
August 9th
Who started this love triangle rumor?
August 10th
All three of us should hang out
August 11th
I'm sorry, it's nothing
August 13th
I'm very sorry
What's happening with Shin?
...
...
...
My neck
...
August 14th
Shin might be hiding something
August 15th
How was Shin feeling that day?
Shin's still a suspect...
August 16th
If it's alright, I would like to walk with Toma
Okay, just while we're eating...
August 17th
I heard you lead the search
Is it true that Shin stayed back at the lodge?
August 18th
Please tell me how to contact the owner
Go with Toma
Could I ask why?
August 19th
Are you okay...?
But I was waiting for you to come back...
Okay, I believe you...
August 22nd
All options
It's okay, I've got it all
It won't take me very long...
August 23rd
Wouldn't it be better for us to go together?
What are you saying?
I just spaced out a bit from the memory...
I don't remember
Toma
August 24th
Why?
I'd actually rather just go home...
Shin, what is this?
Shin
August 26th
We should study together
But you had someone watching me, too...
August 27th
That wasn't the case yesterday
-End-

*Load save 3*
Sawa/Ukyo
Were you the culprit...?
-End-