BTOB's Sungjae and A Pink's Namjoo have revealed the making of their recent duet song "Photograph"!

SEE ALSO: BTOB's Sungjae and A Pink's Namjoo are the newest duet couple for 'Photograph'

The track was released as part of the Cube Entertainment project single album 'A CUBE' FOR SEASON # BLUE Season 2'. Sungjae and Namjoo's voices harmonized perfectly for the duet, and the making-of video reveals that they had chemistry in the studio as well. Both idol stars look like they're having tons of fun singing along.

Check out the adorable video above!