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Episodes 1–9
Episodes 10–12
Episodes 1–4
Episodes 5–8
Episodes 9–12
Original Soundtrack Volume 1
| 1 | Waking-Up Waltz | MOSAIC.WAV | 2:04 |
| 2 | Morning's Arrival | MOSAIC.WAV | 1:58 |
| 3 | School Life Club Activity Log | MOSAIC.WAV | 2:14 |
| 4 | Conversation | MOSAIC.WAV | 1:56 |
| 5 | Humor Maker | MOSAIC.WAV | 2:19 |
| 6 | Blockhead Yuki Makes Merry | MOSAIC.WAV | 2:07 |
| 7 | Kurumi's Refreshing and Physical | MOSAIC.WAV | 2:13 |
| 8 | Blockhead March | MOSAIC.WAV | 1:46 |
| 9 | Don't Be a Blockhead! | MOSAIC.WAV | 1:56 |
| 10 | Dependable Ri-san Takes Care of It | MOSAIC.WAV | 2:43 |
| 11 | Miki's Quick and Logical | MOSAIC.WAV | 2:46 |
| 12 | From Solfège for School: "She's already gone." | MOSAIC.WAV | 3:27 |
| 13 | An Indifferent Verdict | MOSAIC.WAV | 2:17 |
| 14 | An Empty World | MOSAIC.WAV | 2:02 |
| 15 | Thank You, Kind Megu-nee | MOSAIC.WAV | 3:08 |
| 16 | Hey! Stubborn Taromaru | MOSAIC.WAV | 1:50 |
| 17 | Playing Tag! | MOSAIC.WAV | 1:56 |
| 18 | Even More Playing Tag! | MOSAIC.WAV | 1:40 |
| 19 | Unpeaceful | MOSAIC.WAV | 2:26 |
| 20 | A Cruel Expression | MOSAIC.WAV | 2:20 |
| 21 | Hideosity | MOSAIC.WAV | 1:47 |
| 22 | Shake It Off and Run! | MOSAIC.WAV | 2:37 |
| 23 | Things I Wanted to Say | MOSAIC.WAV | 3:01 |
| 24 | The School Smiles for Its Heroes | MOSAIC.WAV | 3:18 |
| 25 | Goodnight for Today | MOSAIC.WAV | 2:02 |
Original Soundtrack Volume 2
| 1 | Clear Sky | MOSAIC.WAV | 1:52 |
| 2 | Don't Run in the Halls | MOSAIC.WAV | 2:27 |
| 3 | Conversation, but It Doesn't Go Anywhere | MOSAIC.WAV | 1:35 |
| 4 | Cozy Lunch | MOSAIC.WAV | 2:05 |
| 5 | I Love School! | MOSAIC.WAV | 2:12 |
| 6 | Situation Talk | MOSAIC.WAV | 2:11 |
| 7 | An Unclear Peace, Like Clouds | MOSAIC.WAV | 2:16 |
| 8 | 3 Points, Let's Work Harder | MOSAIC.WAV | 1:34 |
| 9 | 5 Points, So-So | MOSAIC.WAV | 1:32 |
| 10 | When Kindness Touches You | MOSAIC.WAV | 1:55 |
| 11 | Warm Feelings | MOSAIC.WAV | 2:37 |
| 12 | After School | MOSAIC.WAV | 2:14 |
| 13 | A Peace We Can Have | MOSAIC.WAV | 2:03 |
| 14 | A Horrible Situation | MOSAIC.WAV | 2:23 |
| 15 | Scenery in Our Memories | MOSAIC.WAV | 3:20 |
| 16 | Wrong Scenery in Our Memories | MOSAIC.WAV | 2:21 |
| 17 | Intersecting Memories | MOSAIC.WAV | 2:03 |
| 18 | Emergency Meeting | MOSAIC.WAV | 3:22 |
| 19 | An Unlucky Dream | MOSAIC.WAV | 2:11 |
| 20 | Ri-san? ... Ri-san? | MOSAIC.WAV | 3:20 |
| 21 | Creeping Crud | MOSAIC.WAV | 2:26 |
| 22 | Reunion? | MOSAIC.WAV | 3:06 |
| 23 | Unyielding Strength | MOSAIC.WAV | 3:29 |
| 24 | Die Together | MOSAIC.WAV | 2:44 |
| 25 | Fighting for a Shining Tomorrow | MOSAIC.WAV | 3:46 |
| 26 | Proof of Friendship | MOSAIC.WAV | 2:52 |
| 27 | Everyone's Graduation | MOSAIC.WAV | 3:32 |