Donghae and Joohyun's relationship is nothing but a sunbae-hoobae one. Greeting each other and smiling to one another are the common things they do whenever they ran into each other on-stage, backstage, on-cam, offcam, or just an ordinary day at the company and during company vacations. Not until one day, they both found out they were bound to marry each other. That's when everything took an enormous turn.

In which the three remaining AB6IX members find out about Woong and Woojin's relationship.

Love is annoyingly undefinable.