| Artist name | Roles | Recordings |
|---|---|---|
| 태연 | vocal | Rain, 그리고 하나, 비밀 (Secret) |
| Chelcee Grimes | arranger | 11:11 |
| Christian Vinten | arranger | 11:11 |
| LDN Noise | arranger | Why |
| Lauren Dyson | arranger | Why |
| Artist name | Roles | Recordings |
|---|---|---|
| 태연 | vocal | Rain, 그리고 하나, 비밀 (Secret) |
| Chelcee Grimes | arranger | 11:11 |
| Christian Vinten | arranger | 11:11 |
| LDN Noise | arranger | Why |
| Lauren Dyson | arranger | Why |