He learned earlier that Rap Monster would be participating, but it turns out Junhyung will also take part as a featuring artist! 

"Junhyung will be featuring in a track included in MFBTY's album," said a rep, who added, "Tiger JK had always been interested in not only B2ST's music, but also songs that Junhyung had featured in. So he personally requested for this favor, and the project came to fruition."

MFBTY's new album will drop on the 19th, so get ready to hear some awesome music on the way!