The best answers for this game will be the ones with the '+3'. 

Toy Ring

A. “It’s fine, really.”
B. Go with him. +3
C. Sleep in.

Chapter 2.4

False Email

A. Email him.
B. Call him. +3
C. Email and call him. 

Chapter 3.4

Childhood Friend

A. Tuna Sandwich.
B. Egg Sandwich. +3
C. Tomato Sandwich.

Chapter 4.3 

Little Sister

A. “Three members isn’t enough.”
B. “Saya doesn’t want this.”
C. “Please, don’t go.” +3

Chapter 5.3 
The Promise

A. Are you okay?
B. The move sure is soon. +3
C. Could we talk a little?

Chapter 6.1

Fireworks

A. “Thanks for the email.”
B. “I wanted to hear it in person.”
C. Don’t reply +3

Chapter 7.5 

Three of Us

A. “Take care.” +3
B. “Good luck.”
C. “Tell Saya I said hi.”

Chapter 8.1

Snow

A. Accept the offer. +3
B. Search for a taxi.
C. Rough it outside.

Chapter 9.5 
Melody

A. “I’ll visit you sometime.”
B. “I’ll visit you next week.”
C. “I’ll visit you my next day off.” +3

Chapter 10.2
Confession

A. Go home.
B. Go to the lobby. +3
C. Ask Saya.

Chapter 11.2
Gold Chain

A. Send an email to ENO.
B. Check a fortune site.
C. Send an email to Saya. +3

Chapter 12.4 
Address Book

A. “I’m going home.”
B. “Eno, not going home?”
C. “Can I help with anything?” +3

Chapter 13.1
Country Road

A. Answer. +4
B. Don’t answer.
C. Turn off the phone.

Chapter 14.1
Real Ring

A. Board.
B. Don’t board. +4
C. Stay silent.