| Summer Night | Call Me Gray |
| Summer Night (Remix) | Summer Night (Remix) |
| 꿈이 뭐야 (Dream Chaser) | Call Me Gray |
| Moon Blue | DINGO X GRAY |
| TMI | TMI |
| STAY THE NIGHT | STAY THE NIGHT (취향저격 그녀 X GRAY) |
| Digital Lover (GRAY ver.) | DIGITAL LOVER (GRAY ver.) inspired by [Crush X 현대카드] |
| My Last | WORLDWIDE |
| 깜빡 Remix | 깜빡 Remix |
| 위험해 (Dangerous) | Call Me Gray |
| Don't Try Me | WORLDWIDE |
| 하기나 해 | grayground. 01 |
| In My Head | Call Me Gray |
| 깜빡 | 깜빡 |
| Whatever You Do | Crush On You |
| Malibu | Goodbye My Twenties |
| Late Night | Late Night |
| 무릉도원 (Prod. KHYO) | 사인히어(SignHere) episode2 |
| GOOD | GOOD |
| SMILE (Prod. WOOGIE) | 사인히어(SignHere) episode2 |
| 살아있네 (Prod. GRAY) | 사인히어(SignHere) episode2 |
| 이랴 (Prod. HOLYDAY) | 사인히어(SignHere) episode2 |
| 데려가줘 | 데려가줘 |
| 기억해 | 기억해 |
