- Hard-sugar( 하드슈가 )【 3 songs in total 】
- Sorted by ＞ Sorted by album (Time) Sorted by song name (Characters) Sorted by other
- Song Lyricist Composer Date
- 1 大海 Seo Wonyong Seo Wonyong 2017-08
- 2 唇語告白 Seo Wonyong Seo Wonyong 2017-08
- 3 意外之愛 Seo Wonyong Seo Wonyong 2018-07