Byeol Eun (별은) - Happy Birthday (생일 축하해) (with. Jeong Yubin) ko
Jung Seung Hwan - If It Is You (너였다면) ko
Lee Seok Hoon (이석훈) - I’ll Be There ko
Ben - Like A Dream (꿈처럼) ko
Roy Kim - Maybe I (어쩌면 나) ko
Kim EZ (김이지) (Ggotjam Project (꽃잠프로젝트)) - Scatter (흩어져) ko
The Black Skirts (검정치마) - Wait More (기다린 만큼, 더) ko
Seo Hyun Jin - What Is Love (사랑이 뭔데) (With Yoo Seung Woo (유승우)) ko