| Blue |
-
|
| Dream 드림 |
-
|
| Fix Me |
-
|
| Lost Without You |
-
|
| Romantic Wish |
-
|
| Some |
-
|
| X Song |
Full Album RED PLANET
|
| You(=I) |
Full Album RED PLANET
|
| 가끔씩 (Sometimes) |
Half Album RED ICKLE
|
| 가리워진 길 (The Covered-Up Road) |
미생 (Incomplete Life) (Original Television Soundtrack), Pt.4
|
| 나만 안되는 연애 (Hard to Love) |
Full Album RED PLANET
|
| 나의 사춘기에게 (To My Youth) |
-
|
| 드림 (Dream) |
화랑 (HWARANG), Pt. 3 (Music from the Original TV Series)
|
| 반지 (Ring) |
Half Album RED ICKLE
|
| 사랑에 빠졌을 때 (When You Fall In Love) |
Full Album RED PLANET
|
| 상상 (Imagine) |
-
|
| 심술 (Grumpy) |
Half Album RED ICKLE
|
| 싸운날 (Fight Day) |
Half Album RED ICKLE
|
| 우리집을 못 찾겠군요 (Lost Without You) |
-
|
| 우주를 줄게 (Let The Universe) |
Full Album RED PLANET
|
| 이별맛집 (Separation Restaurant) |
-
|
| 좋다고 말해 (Tell Me You Like Me) |
Full Album RED PLANET
|
| 초콜릿 (Chocolate) |
Half Album RED ICKLE
|
| 프리지아 (Freesia) |
Full Album RED PLANET
|