| Artist name | Roles | Recordings |
|---|---|---|
| Toy (Korean project of You Hee-yeol) | ||
| Guillaume Denimals | ||
| Mark Harris (guitarist with The Brills; husband of Heather Mac) |
| Artist name | Roles | Recordings |
|---|---|---|
| Toy | performer, vocal | 딸에게 보내는 노래, 소박했던, 행복했던 (feat. 성시경) |
| Guillaume Denimals | producer | 여전히 아늑해 (Still) |
| Mark Harris | vocal | 잘못 |