Both SM Entertainment and Woollim confirmed that Key and Woohyun will form a sub-unit and have a debut around next month.

From a representative they said both of them will come out and show a distinctive music and performance which is different from both groups usual styles.

Woollim Entertainment merged with SM C and C last August and later renamed to Woollim Label. For Key and Woohyun collaboration both the agencies said this will be their first official sub-unit ever since they merged together.

An official source said,"The album is likely to be released around February, and latest will be around March-April. They haven't decided on the team's name yet and currently preparing to record for the album. Please look forward to their collaboration".