3rd Anniversary Song Campaign was a song campaign celebrating Project SEKAI's 3rd Anniversary.
Song list
| Release date | Song | Producer(s) | MV |
|---|---|---|---|
| ? | ○○ | ? | Original MV |
| ? | ○○○○ | ? | Original MV |
| ? | ○○○○○○○ | ? | Original MV |
| ? | ○○○○○○○○○○○○○ | ? | 3D MV |
| ? | ○○○○ | ? | No MV |
| ? | ○○○○○○○○○ | ? | Original MV |
| ? | ○○○○○○○○○○○○ | ? | 3D MV |
| ? | ○○ | ? | No MV |
| ? | ○○○○○ | ? | Original MV |
| ? | ○○○○ | ? | No MV |