On the 10th, the official site of the Oricon reported that Dong Hae and Eun Hyuk are scheduled to release their first duet song "Oppa Take-off" (떳다 오빠) on April 4th in Japan.

The song is from their "Super Junior World Tour - Super Show 4" performance the two created together, which gained a lot of popularity. They'll soon be releasing the Japanese version of the song.

The song has a retro-disco feel that is very up-beat with humorous lyrics. It was released in Korea last year on December 16th.

At their Super Show 4 concert, 80,000 fans have shown up in total to show their support.