Zia (지아) (also known as Zi-A)

Road Movie [Album] (2008.07.12)

1. Nanhaengbokhae (난행복해; I'm Happy)

2. Naeotteokhae (나어떡해; What Am I to Do)

3. Saranghae Mianhae (사랑해 미안해; I Love You, I'm Sorry)

4. Meonbalchi (먼발치; A Distant Place)

5. Keudaemanboyeoyo (Feat. T.O.P) (그대만보여요; I Only See You)

6. Sarangman Araseo (사랑만 알아서; I Only Know Love)

7. Eomma Mianhaeyo (엄마 미안해요; Mom, I'm Sorry)

8. Useojulrae (웃어줄래; Will You Smile for Me)

9. Mungkeul (뭉클; Choked With Grief)

10. Sinchoneseo Hongdaekkaji (신촌에서 홍대까지; From Sinchon to Hongdae)

11. Byeol (별; Star)

12. Udukeoni (우두커니; Blank)

13. Kakkaseuro (가까스로; The Closer You Get)

14. Gobaek (고백; Confession)

15. Nalgeun Ot (낡은옷; Worn Out Clothes)

16. Saranghae Mianhae (Piano Ver.) (사랑해 미안해; I Love You, I'm Sorry)

FH

Orchestra [Mini Album] (2009.04.02)

1. Geureondamyeonseo (그런다면서; Yet)

2. Teojil Geot Gata (터질 것 같아; Feel Like Exploding)

3. Sarangkeuteumeori (feat. Jang Geun Yi) (사랑끄트머리 (feat. 장근이); Love Point)

4. Sarange Micheoseo (사랑에 미쳐서; Crazy With Love)

5. Munjaro Ibyeolhaneun Il (문자로 이별하는 일; Breaking Up With a Text)

6. Jeonhal Ssu Eomneun Mal (전할 수 없는 말; Words I Can't Send)

7. Geureondamyeonseo (Piano Ver) (그런다면서)

8. Sarange Micheoseo (Piano Ver) (사랑에 미쳐서)

FH

ATELIER [Mini Album] (2009.12.28)

1. Ijeumyeon Andwae (잊으면 안돼; Do Not Forget)

2. Geunyeocheoreom (그녀처럼; Like Her)

3. Geu Nal Ihubuteo (그 날 이후부터; The Day After)

4. Saranghae Jwoyo (사랑해 줘요; Love Me)

5. Sul Hanjan Haeyo (술 한잔 해요; Have A Drink)

6. Geunyeocheoreom (inst.) (그녀처럼)

7. Sul Hanjan Haeyo (inst.) (술 한잔 해요)

FH

Difference [Mini Album] (2010.08.06)

1. Useumman.. (웃음만..; Laughter)

2. Sigana Butakalkke (Feat. SeeYa Yeon Ji) (시간아 부탁할게(Feat. 씨야 연지); Time, I Want You)

3. Bulgam (불감; No Sense)

4. Mitkko Sipeo (믿고 싶어; Want to Believe)

5. Jal Kka..Ji Ma (잘 가..지 마; Don't.. Go)

6. Sarangeul Kkareucheo Juseyo (Feat. K.Will) (사랑을 가르쳐 주세요 (Feat.케이윌); Give Me Your Love)

7. Useumman.. (Inst.) (웃음만..; Laughter)

FH

Avancer [Album] (2011.09.30)

1. Naega Ireochi (feat. Ha Dong Qn) (내가 이렇지)

2. Nuga Geojitmalhaennayo (누가 거짓말했나요)

3. Igeon Nae Norae (이건 내 노래)

4. Heeojin Cheotnal (헤어진 첫날)

5. Sarangeul Jeogeoyo (with Mir of MBLAQ) (사랑을 적어요)

6. Jibe Isseul Geoeyo (집에 있을 거에요)

7. Seumulle Sigan (with Park Jung Ah) (스물네 시간)

8. Ttak Hanbeonman Deo (딱 한번만 더)

9. Geudaeigil Baraeyo (with K.Will) (그대이길 바래요)

10. Naega Ireochi (inst.) (내가 이렇지)

11. Geudaeigil Baraeyo (inst.) (그대이길 바래요)

FH

Anemone [Mini Album] (2012.12.10)

1. Bangmuneul Jamgeugo (방문을 잠그고; Lock The Room Door)

2. Il Nyeonjjae (일 년째; One Year Worth)

3. Nunmuri Tuk (feat. Park Kyung) (눈물이 툭; Tears Fall)

4. Naleul Ijeodo (나를 잊어도; Even If You Forget Me)

5. I Need You (Huh Gak & Zia)

FH

If You Loved [Digital Single] (2013.09.06)

1. 사랑했었다면

FH

To Be Expected [Single] (2013.12.24)

1. 그런 줄 알았어

2. 그런 줄 알았어(Inst.)

FH

After 11 Days [Album] (2014.01.13)

1. Have You Ever Cried (울어본 적 있나요)

2. Hurt (ft. LE) (아프다 아프다)

3. Because I Love You (그까짓 사랑 때문에)

4. I'm Godd (이별 참 쉽더라)

5. When I Miss You (그리운 날에)

6. Broken Up (이별했다)

7. The Lie (거짓말 )

8. To Be Expected (그런 줄 알았어)

9. Loved You (with Seo In Guk) (이별남녀)

10. If You Loved Me (with Lee Hae Ri (사랑했었다면)

FH

Falling In Fall [Mini Album] (2014.10.06)

1. 웃게 해줄게

2. Falling In Love (duet with 환희)

3. 무릎담요

4. 밥 한 숟갈

5. 잊어버린 채 살아

6. 보란 듯이

7. Falling In Love (inst.)

8. 보란 듯이 (inst.)

FH

WHITE [Single] (2016.02.05)

1. 눈물

2. 그 남자가

3. .눈물 (inst.)

4. 그 남자가 (inst.)

FH

Ileon Nalado Gwaenchanhnayo (이런 나라도 괜찮나요; Even Though Me) 

[Digital Single] (2018.07.09)

1. 이런 나라도 괜찮나요 (Prod. 김현철) [[Even Though Me(Prod. Kim Hyun-Chul)]
FH

니가 길게 혼자면 좋겠어 [Digital Single] (2019.07.04)

1. 니가 길게 혼자면 좋겠어

2. 니가 길게 혼자면 좋겠어 (Inst.)

FH

Miss You [Digital Single] (2020.07.03)

1. 오늘 술 한잔해요 (Miss You)

2. 오늘 술 한잔해요 (Miss You) (Instrumental)

FH