Singer Yoon Jong Shin's company Mystic89 made an announcement notice.

Mystic89 is planning for an announcement via Mystic's live channel 'Mystic Cast.' The surprise news will be publicly broadcast on their official YouTube channel (https://youtube.com/welcomemystic89).

A Mystic89 rep commented, "Mystic89 is an entertainment company that attempts to try a variety of music. We're expecting this announcement to attract a lot of attention. We hope many people will show interest in our Mystic Cast live broadcast."

"Mystic Cast" is an online broadcast channel that is directly managed by Mystic89.