You got all the trophies!
Speak to Shimanekko for the first time.
Finish Chapter 1.
Acquire all items.
Use the "Check" command 100+ times.
Use the "Check" command 50+ times.
Select all letter replies.
Finish Chapter 2.
Finish all routes.
Finish Chapter 3.
Finish Chapter 4.
Finish Chapter 5.
Finish Chapter 6.
Finish Chapter 7.
Finish Chapter 8.