BOYNEXTDOOR is ready to make their comeback.

On April 5 at midnight KST, the boys unveiled the new set of concept photos for their 2nd mini-album 'HOW?' BOYNEXTDOOR members show off their playful side as they are seen hanging out with one another in a vintage mansion.

Meanwhile, 'HOW?' is BOYNEXTDOOR's upcoming second mini album set to drop on April 15 KST. So stay tuned for more teasers until the album releases!