Hailey – Purple (feat. Seo Jin Lee)
Track 01 from Single "PURPLE"
Release Date: 2019.12.30
Hailey – Sunrise Sunset (feat. Hea Lin Gwak)
Track 01 from Single "SUNRISE SUNSET"
Release Date: 2020.02.13
Hailey – At dawn (feat. Yun Ji Lee)
Track 01 from Single "AT DAWN"
Release Date: 2020.01.28