SEE ALSO: [PHOTOS] BTOB express enthusiasm about finally meeting fans through 'Our Dream' fan concert tour

After recording "Like a Child", the two idol stars decided to film a music video at the zoo. For their 'bbyucket list', Sungjae acted as director, saying, "To show the youthful nature of kids, we needed animals and a field."

The BTOB member also promised that an actor Joy could be excited for was coming. She was hoping it was Song Joong Ki, and Sungjae did his best to transform into the hot 'Descendants of the Sun' star.

Sungjae and Joy's duet song could very well signal their upcoming leave from the show. Do you want them to stay or are you ready for another pairing?