Who are the heroes and heroines in the MV version of The Photographer Who Never Break Up?

After they finally released their own album, Chae Yeon's U 1traCats group won the Japanese Newcomer of the Year Award and held its first concert. Unfortunately, fate stood in my way. Just when everything became clear and Chae Yeon's efforts finally began to pay off, its economic company suddenly declared bankruptcy and U 1traCats Group was forced to dissolve.