BtoB

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Ambiguous by Seo Eun Kwang (서은광), Im Hyun Shik (임현식), Yook Sung Jae - Fight for My Way OST (2017)
Voice - The Miracle OST (2016)
For You, For You (Ballad ver.) - Cinderella and the Four Knights OST (2016)
After the Show Ends by Lee Chang Sub (이창섭), Lee Min Hyuk with Elkie (엘키) - After the Show Ends OST (2016)
No by Lee Min Hyuk & Bang Min Ah - Sweet, Savage Family OST (2015)
Goodbye Sadness - Sweet, Savage Family OST (2015)
Loving You Again - Scholar Who Walks the Night OST (2015)
I Miss You by Seo Eun Kwang (서은광) & Mi Yoo (미유) - Mask OST (2015)
Love Song by Yook Sung Jae with Park Hye Soo - Who Are You - School 2015 OST (2014)
Curious by Yook Sung Jae with Oh Seung Hee (오승희) - Plus Nine Boys OST (2014)
First Love with Yong Joon Hyung - Monstar OST
After Time Passes with Yong Joon Hyung - Monstar OST
Past Days with Yong Joon Hyung & Ha Yun Soo - Monstar OST
Bye Bye Love with BEAST - When a Man Loves OST (2013)