Boy group HALO is gearing up for a refreshing comeback, squeezing in a summer release right as the season nears the end!

Don't resign yourself to autumn just yet because their 2nd mini-album, 'Happy Day,' promises to brighten up your life.  The MV teaser shows each member and the group in a circle, enjoying themselves, with bright colors to lift your mood!

Listen above to the preview of the cheery song!