Male duet December has climbed to the top of music charts, following the release of their new song on Thursday. The duet’s digital single, “All I Learned Is Love,” has topped the Cyworld realtime music chart and placed second in the Nate.com chart after only half a day on the market. December shot to stardom when they sang the title track of hit TV drama “Iris,” starring Lee Byung-hun and Kim Tae-hee.

The duet’s agency said that their latest release earned great marks during the pre-marketing monitoring and it’s very unusual for relative newcomers to win such great responses from both on and offline sites so soon after the song’s release. The duet’s activity will start in earnest on March 5th when they make their first media appearance on Music Bank on KBS 2TV.