Iris Fall

Iris.Fall - 100% Achievement Walkthrough + Commentary
Timestamps:
0:00 Chapter 1
5:35 Chapter 2
6:10 Complete Circuit
10:05 Chapter 3
10:06 Good Timing
12:07 Clumsy
15:23 Chapter 4
17:10 Observer
20:00 Chapter 5
20:01 Hey Kitty
21:15 Cube Master
23:15 Chapter 6
25:15 Ink Saver
28:35 Quite Easily Done
29:44 Chapter 7
29:45 Book Lover
34:25 Lingering Tune
36:21 Chapter 8
36:41 Discovery
44:33 Do Not Pass Part 1
47:50 Do Not Pass Part 2
51:25 True Self

Story related. Just complete chapter 3 to pop the achievement.