.. is that it was supposed to be Daehyun doing this with Youngjae instead of Jongup.

Since the most popular OTP in B.A.P is DaeJae and mostly Babyz are DaeJae shipper, so they need to do a parody of W as a form of fanservice.

But stupid Daehyun can't control himself and messed it up.

On the script, Daehyun as Kang chul was supposed to tied Youngjae a.k.a Yeon Joo's hair, then bring him to bed where he give him a peck on the lips. Just a peck! But Jung Daehyun being the ert one he is seeing Youngjae with long hair spread out in bed can't control himself. Instead of pecking Youngjae's lips he kissed him full on the mouth, startling Youngjae and everybody in the room. Not just that, Daehyun bit his lover's lips making he gasp then insert his tongue into the younger's mouth, exploring the hot cavern. 

At first Youngjae tried to push Daehyun off of him, since they were being watched by the filming crew, the manajer and other members. But he can't resist his lover's tongue caressing his mouth and they were soon making out, ignoring the director's yell of "cut!"

It was when the leader come into action and pull them away from each other then they stop their making out session.

That's why Daehyun ended up doing the parody with Jongup instead of Youngjae. And the director threatening to make a DOTS parody with Zelo and Youngjae as the main casts if Daehyun messed up again this time. So Daehyun got no choice but to do it acc