2017

• Purple Rain (ft. CHEEZE)        - Piece of BtoB vol. 5
  

2016

• You to the Bone (by Yu-bin ft. Heota)
  
• After the Show Ends (with Changsub, Elkie) -After the Show Ends OST
  
• For You (with Changsub, Eunkwang, Ilhoon) -Cinderella and Four Knights OST
  

2015

• I'm OK (Postmen) -ft. Heota
  
• 2 Limes (Inoran ft. Peniel, Ilhoon) -Beautiful Now
  
• No (with Minah)                                -Sweet, Savage Family OST
  

2013

• Past Days (with Junhyung, Ha Yeon-soo, Changsub, Hyunsik, Sungjae) -Monstar OST
  
• After Time Passes (with Junhyung, Changsub,Hyunsik, Sungjae) -Monstar OST
  
• First Love (with Junhyung, Changsub, Hyunsik,Sungjae) -Monstar OST