Here is the full list of all 12 Welcome to Pammy's Story in the World of Project: Summer Ice (Visual Novel) trophies - 11 gold and 1 platinum.
Awarded after earning all other trophies
Complete Level 8
Complete Level 9
Complete Level 7
Complete Level 5
Complete Level 6
Complete Level 2
Complete Level 3
Complete Level 4
Meet Pammy
Complete Level 1
Introduce Project: Summer Ice