Here's another hint or fact courtesy of GF BB!
On Dec. 22nd, MM's musical professor at the university posted photos in his twitter account; it included photos of him with MM and a group photo with MM and other students. As can be seen MM with "v" or peace sign.
The following day, Dec. 23rd, the media shared a photo of HJ with lead actress in IG - both actors also did a "v" or peace sign... or, is it? Could it be that HJ and MM are showing their #2 gesture. *wink-wink*