| Bird | MAY | | | ?:?? | |
| BIRD | MAY | | | 3:50 | |
| BIRD | MAY | | | ?:?? | |
| Everything | MAY | | | ?:?? | |
| Fall In Love | MAY | | | ?:?? | |
| Fall In Love (Acoustic Version) | MAY | | | ?:?? | |
| Floating (English version) | MAY | | | ?:?? | |
| Fly Away | MAY | | | ?:?? | |
| FLY AWAY | MAY | | | 4:00 | |
| FLY AWAY | MAY | | | ?:?? | |
| FLY AWAY (Instrumental) | MAY | | | ?:?? | |
| I'LL DO ANYTHING | MAY | | | ?:?? | |
| I'LL DO ANYTHING (Instrumental) | MAY | | | ?:?? | |
| Kiss Me | MAY | | | ?:?? | |
| KIZUNA | MAY | | | ?:?? | |
| KIZUNA (instrumental) | MAY | | | ?:?? | |
| LYDIA | MAY | | | ?:?? | |
| LYDIA (Instrumental) | MAY | | | ?:?? | |
| Lydia (리디아) | MAY | | | ?:?? | |
| Miracle (기적) (SBS '반전드라마' 삽입곡) | MAY | | | ?:?? | |
| Smile | MAY | | | ?:?? | |
| SMILE | MAY | | | 3:17 | |
| Smile (Instrumental) | MAY | | | ?:?? | |
| Standing Still (Live Version) | MAY | | | ?:?? | |
| SURRENDER | MAY | | | 3:21 | |
| SURRENDER | MAY | | | ?:?? | |
| SURRENDER (Instrumental) | MAY | | | ?:?? | |
| Winter Wonderland | MAY | | | 3:29 | |
| Wonderland | MAY | | | ?:?? | |
| WONDERLAND | MAY | | | 3:51 | |
| WONDERLAND | MAY | | | ?:?? | |
| WONDERLAND | MAY | | | 3:51 | |
| Wonderland (12bit Productions Remix) | MAY | | | ?:?? | |
| WONDERLAND (English) | MAY | | | ?:?? | |
| Wonderland (Instrumental) | MAY | | | ?:?? | |
| WONDERLAND (Instrumental) | MAY | | | ?:?? | |
| WONDERLAND (Korean) | MAY | | | ?:?? | |
| You | MAY | | | ?:?? | |
| YOU | MAY | | | ?:?? | |
| YOU (instrumental) | MAY | | | ?:?? | |
| 기적 | MAY | | | ?:?? | |
| 돌아올텐데 (KBS 애니메이션 'Iron Kid' 엔딩 테마) | MAY | | | ?:?? | |
| 못된 나 | MAY | | | ?:?? | |
| 못된 나 (instrumental) | MAY | | | ?:?? | |
| 왜 나를... | MAY | | | ?:?? | |
| 울컥 | MAY | | | ?:?? | |
| 울컥 (Instrumental) | MAY | | | ?:?? | |
| 함께 있어 좋은 사람 (feat. 토니 안) | MAY | | | ?:?? | |
| オンナゴコロ | MAY | | | ?:?? | |
| オンナゴコロ (instrumental) | MAY | | | ?:?? | |
| さよならの陽射し | MAY | | | 4:13 | |
| さよならの陽射し acoustic version | MAY | | | ?:?? | |
| さよならの陽射し acoustic version (instrumental) | MAY | | | ?:?? | |
| サライの風 | MAY | | | 4:43 | |
| サライの風 | MAY | | | ?:?? | |
| サライの風 (Instrumental) | MAY | | | ?:?? | |
| ヘビイチゴ | MAY | | | 3:35 | |
| 彼ら二人は愛と歓喜の極彩世界の中を歩いている― | sound piercer with MAY (feat.Ritsu) | | | 3:39 | |
| 時をとめて | MAY | | | ?:?? | |
| 時をとめて (instrumental) | MAY | | | ?:?? | |
| 木枯らしの純情 | MAY | | | 3:57 | |
| 木枯らしの純情 | MAY | | | ?:?? | |
| 木枯らしの純情 (Instrumental) | MAY | | | ?:?? | |
| 消えない虹 | MAY | | | 4:36 | |
| 消えない虹 | MAY | | | ?:?? | |
| 消えない虹 (instrumental) | MAY | | | ?:?? | |
