BOYNEXTDOOR is back! 

Just a little over three months since the group's debut back in May, Zico's label, KOZ Entertainment's latest boy group BOYNEXTDOOR made their first comeback with 1st EP 'WHY...'.

In the music video released for the title track of their EP, "But Sometimes," BOYNEXTDOOR takes us through a dramatic heartbreak, continuing the storyline from their debut single 'WHO?' where the boys had found a crush. This vibrant music video showcases the fun and upbeat pop-rock song, with the members expressing their feelings of upset and anger.

Check out full music video above, and let us know what you think in the comments below!