2017

• Eating Alone (with Luizy) -Sing For You - Seventh Story Change
  
• Ambiguous (with Seo Eunkwang and Yook Sung-jae) -Fight For My Way OST
  
• Swimming -Piece of BTOB Vol. 4
  

2016

• Baby Ride  (with Luizy) -Baby Ride
  

2015

• Playground (with Eden Beatz)
  

2013

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