Hero mode On vs Off #IVE

In the Korean comments

The ending is the moment to watch for. One comment reads, in translation, “I was about to say they look like real heroes again today, but then the ending—so cute.” Another viewer specifically asks about the familiar-sounding music used during the “Hero mode Off” portion.

What the words mean

“컨셉에 지배 당해버린게 개웃기네” (keonsebe jibaedanghae beoringe gae-utgine, “It’s freaking hilarious how the concept took over”) literally describes being dominated by a concept. Here it jokingly means someone commits to the performance persona so completely that the concept seems to control them; it is highly casual, with 개 (gae, “freaking”) adding emphatic slang.