Super Junior has revealed that their upcoming comeback will feature an exciting new collaboration!

After confirming earlier this week that they would be returning with a repackaged album in late January, Super Junior has now released footage of a mystery producer talking about a new song he’s written for the group. The intriguing new teaser, which begins by asking “Who’s that?” as the producer enters the recording studio and asks to hear the demo, also contains a few hints about his identity.

The producer, whose face is blurred out in the video, says at one point, “I kind of wrote the lyrics for the bridge in SM’s style,” hinting that he may not be affiliated with SM Entertainment. He also refers to Super Junior as “hyungs,” revealing that he’s younger than the group’s members.

After warmly greeting several members of Super Junior in the studio, he tells them, “Please speak to me comfortably [in informal speech].” He then asks, “Should we start recording?”

Finally, the video ends with the producer seemingly pleased with the Super Junior members’ recording session as he happily declares, “Super Junior! So cool. Daebak, daebak.”

Who do you think the mystery producer in the video is?