Halloween 2015: Jeong-han as Harley Quinn theqoo.
The outfit, as opposed to the makeup, seem to draw more from the comic version of the character as in the comics, Harley Quinn almost always sports a red and black outfit that is reminiscent of jesters in a traditional kingdom court.
The two played up the skinship by Mingyu wrapping Jeong-han in his cape, also fixing his hair while he is at it, sending fans into a craze.