하이투힘 (Hi to him) – 여름은
Release Date: 2014.08.29
하이투힘 (Hi to him) – 반짝반짝
Release Date: 2018.01.16
하이투힘 (Hi to him) – EP3
Release Date: 2017.07.24
하이투힘 (Hi to him) – Ep 2
Release Date: 2013.06.05
하이투힘 (Hi to him) – EP
Release Date: 2012.03.14
하이투힘 (Hi to him) – 그냥하자
Release Date: 2016.07.19
하이투힘 (Hi to him) – Winter Waltz For Christmas
Release Date: 2012.12.14
하이투힘 (Hi to him) – Beauty Life
Release Date: 2018.08.22
하이투힘 (Hi to him) – 말하지 못 한 이야기
Release Date: 2014.08.04
하이투힘 (Hi to him) – 지난 겨울
Release Date: 2014.03.19
서영일 – 철 지난 여름 노래
Release Date: 2015.10.05