The best winter concert of this era! Sung Si Kyung, also known as 'Sung Ballad', returns after a year with a joint concert with his musical friends. Enjoy the timeless masterpieces of the best 'singers' of this era and the luxurious harmony of Sung Ballad and his musical friends. The moment you hear it, you'll be able to sing along from your couch! A medley of Sung Si Kyung and friends' hit songs that will make you want to go to karaoke!