Hyungdon & Daejune have lent their voices for 'My Fellow Citizens' OST. 

'My Fellow Citizens' is a new comedy/crime drama starring Siwon, Lee Yoo Young, and Kim Min Jung, telling the story of a world-class swindler who marries a policewoman. Through a series of lies and deceits, the swindler must put on an act and run for congressman.

Hyungdon & Daejune sang the OST titled "Yadannatadaya," a comical piece with unique lyrics and an addictive melody. 

Check out the MV above.