H1-KEY (하이키) – 국지성호우 (Rainfalls)
Track 04 from EP 'H1-KEY 3rd Mini Album [LOVE or HATE]'
H1-KEY (하이키) – ♥ Letter
Track 02 from EP 'H1-KEY 3rd Mini Album [LOVE or HATE]'
H1-KEY (하이키) – 나를 위한, 나에 의한, 나만의 이야기 (Iconic)
Track 03 from EP 'H1-KEY 3rd Mini Album [LOVE or HATE]'
H1-KEY (하이키) – 뜨거워지자 (Let It Burn)
Track 01 from EP 'H1-KEY 3rd Mini Album [LOVE or HATE]'
H1-KEY (하이키) – 기뻐 (Deeper)
Track 01 from Single 'H1-KEYnote #2 [기뻐] (Deeper)'
H1-KEY (하이키) – Thinkin’ About You
Track 01 from Single 'H1-KEYnote #1 [Thinkin' About You]'