When the story is read on the website Tapas, some of the pages have their own soundtrack, that matches the contents of the page in some way, be it visual or verbally.
This is the complete soundtrack list, with chapter and page in which they appear, according to Tapas.
| Artist | Song | Chapter | Page |
|---|---|---|---|
| Yann Tiersen | Pas Si Simple | Understand Me (3) | 14 |
| Myuu | Reversion 2015 | Understand Me (3) | 19 |
| Ib OST | The Little Doll's Dream | Understand Me (3) | 21 |
| To The Moon | Having Lived | Understand Me (3) | 22 |
| Myuu | Bad Encounter | Understand Me (3) | 25 |
| Myuu | Living In The Dark | Understand Me (3) | 26 |
| Ib OST | Old Puppet | Understand Me (3) | 29 |
| Myuu | The End Is Always Near | Understand Me (3) | 30 |
| Myuu | Something's Wrong | Understand Me (3) | 31 |
| Myuu | Look Out | Understand Me (3) | 32 |
| Cytus | Entrance Full Song | Understand Me (3) | 33 |
| Cytus | Biotonic | Understand Me (3) | 34 |
| Steven Universe | Synchronize/Sugilite | Understand Me (3) | 35 |
| Charlie Clouser | Dead Silence Theme | Understand Me (3) | 37 |
| Charlie Clouser | SAW Theme | Understand Me (3) | 38 |
| Kevin MacLeod | Quinn's Song: A New Man | Understand Me (3) | 39 |
| Pan's Labyrinth | Lullaby (Music Box) | Understand Me (3) | 40 |
| Kevin MacLeod | Sneak Snitch | Understand Me (3) | 41 |
| Kevin MacLeod | Monkeys Spinning Monkeys | Understand Me (3) | 42 |
| Myuu | Rise And Fall | Understand Me (3) | 43 |
| Castle In The Sky | Kimi Wo Nosete | Understand Me (3) | 44 |