Twenty-Five Twenty-One – OST (Taeil, Jihyo, Bona, DK, BIBI)

CD 1

1. “Starlight” – 3:45
2. “Shine On You with Blinding Flash of Light (눈이 부시도록 너를 비춰줄게)” – 3:14
3. “Very, Slowly (아주, 천천히)” – 3:34
4. “Your Existence (존재만으로)” – 3:24
5. “Go!” – 3:29
6. “Stardust Love Song” – 4:11
7. “With” – 4:29
8. “Free (가보자)” – 4:46
9. “Your World (너의 세상)” – 3:27
10. “Hello (첫 인사)” – 2:12
11. “Shining Man (햇살보다 빛나는)” – 2:46
12. “Warrior (검객)” – 2:06
13. “You Are My Dream” – 2:59
14. “Whoops! (헐!)” – 1:52
15. “Sining In The Rain (비의 노래)” – 2:05
16. “Heartbroken (상심)” – 1:39
17. “Cute Guy (귀여운 남자)” – 2:22
18. “Our Story (우리들의 이야기)” – 2:24
19. “Pretty Brats (하는 짓이 예쁜 일진)” – 2:06
20. “Understand (이해)” – 2:48
21. “When We Was Young (그날 너와 나)” – 2:43

CD 2

1. “Starlight (Piano Ver.)” – 3:22
2. “Free (가보자) (Guitar Ver.)” – 1:59
3. “Jealous (질투대장)” – 1:32
4. “Looking Your Eyes” – 1:28
5. “Pink Cheek (핑크볼 소녀)” – 1:28
6. “New Beginnings (새로운 시작)” – 2:48
7. “Match (승부)” – 2:03
8. “For a Dream (꿈을 위해)” – 2:12
9. “Dreaming Day (꿈꾸던 시절)” – 3:13
10. “Then Today (그때 오늘)” – 2:18
11. “Goodbye (굿바이)” – 3:13
12. “Lovely Couple (러블리 커플)” – 1:52
13. “Missing You (그리운 사람)” – 2:32
14. “Their Friendship (그녀들의 우정)” – 3:21
15. “Whispers of Love (사랑의 속삭임)” – 2:01
16. “Will (의지)” – 2:27
17. “Western Pioneer (서부의 개척자)” – 3:09
18. “Reunion (해후)” – 2:55
19. “Proposal (프러포즈)” – 2:05
20. “Country of Brothers (컨츄리 오형제)” – 1:58
21. “Just Do It (하면 된다)” – 2:35
22. “Fuss (난리법석)” – 1:47