Singer Hwanhee is back on this week's episode of 'Music Bank' with his follow-up track, "So You Don't Know"! "So You Don't Know", was produced by Lee Sang In and is described to be a ballad track that features a soft piano melody.� The song is arranged in a unique way so that it feels like he's singing for that one special listener. After concluding his promotions, he'll be going back to film for his movie. "We think it'll take about one or two more weeks for Hwanhee to focus on getting his film schedule completed," said his representatives. Check out his performance below! Source + Photos: Segye via Naver