Root Letter

Each ending is determined by what responses you choose when recalling what you replied to Aya's letter with.

The endings for this trophy are:
The Cursed Letter
The Princess of Himegamori Forest
A Government Plot (unlocks after first playthrough)
Crossing Paths

Also note that the replies for Chapter 3's letter won't pop until a few minutes into the chapter.

Cursed Letter replies

Chapter 1: The First Letter
Reading
Do you like to read?

Chapter 2: Dragonfly Stationery
I think I’d like to explore old ruins
Are there any spooky stories about Shimane?

Chapter 3: Banana Stationery
I don’t want to become an adult
Do you want to become an adult soon?

Chapter 4: Candy Stationery
Girls seem self-centered
What do you think of your own personality?

Chapter 5: Gal Stationery
Nature
Do you believe in ghosts?

Chapter 6: Ginger Stationery
Long, black hair is beautiful
Do you like black hair?

Chapter 7: Gnome Stationery
Right now I enjoy doing stuff with friends
Where do you hang out with friends?

Chapter 8: Magatama Stationery has no letter replies and cannot be skipped.

If you got the route correctly, Chapter 9: Crow Stationery should start up.

The Princess of Himegamori Forest replies

Chapter 1: The First Letter
Walking Around the Shrine
Do you like folklore?

Chapter 2: Dragonfly Stationery
I think I’ll research history
Where there any famous warriors from Shimane?

Chapter 3: Banana Stationery
I don’t want to have ideals
What do you think of selfish adults?

Chapter 4: Candy Stationery
I like girls
Aya, what do you think about history buffs?

Chapter 5: Gal Stationery
Ancestors
What kinds of times do you enjoy?

Chapter 6: Ginger Stationery
Mysterious and beautiful people
Are you interested in studying folklore?

Chapter 7: Gnome Stationery
Right now I’m concentrating on studying
How do you study history?

Chapter 8: Magatama Stationery has no letter replies and cannot be skipped.

If you got the route correctly, Chapter 9: Mirror Stationery should start up.

A Government Plot replies
(unlocks after playing through the game once)

Chapter 1: The First Letter
Go for a Walk
Do you believe in aliens?

Chapter 2: Dragonfly Stationery
I think I’d like to see a meteor shower
Is there a good view of the starts in Shimane?

Chapter 3: Banana Stationery
My ideal adult is rich
Do you like rich people?

Chapter 4: Candy Stationery
I don’t care about gender or nationality
Do you like aliens?

Chapter 5: Gal Stationery
Money
Are you interested in making money?

Chapter 6: Ginger Stationery
Girls with nice figures
Please tell me your measurements

Chapter 7: Gnome Stationery
I can’t focus myself
Where do people go on dates in Matsue?

Chapter 8: Magatama Stationery has no letter replies and cannot be skipped.

If you got the route correctly, Chapter 9: UFO Stationery should start up.

Crossing Paths replies

Chapter 1: The First Letter
Go Play
Do you like sports?

Chapter 2: Dragonfly Stationery
I think I’d like to participate in a school function
What kinds of events are popular in Shimane?

Chapter 3: Banana Stationery
My ideal adult is someone who has dreams
What kind of adult do you want to become?

Chapter 4: Candy Stationery
Friendship between men and women is wonderful
Do you think men and women can be friends?

Chapter 5: Gal Stationery
Kindness
Tell me about your personality

Chapter 6: Ginger Stationery
People who are fun
What kind of people do you like?

Chapter 7: Gnome Stationery
There’s someone in my mind
Aya, is there someone you like?

Chapter 8: Magatama Stationery has no letter replies and cannot be skipped.

If you got the route correctly, Chapter 9: Rain Stationery should start up.