ASTRO have released a fresh batch of teaser images for their upcoming second mini album 'Summer Vibes'! The boys are going for refreshing and cute, smiling happily in matching outfits reminiscent of schoolboy uniforms. It's the perfect concept for a summer comeback, and ASTRO couldn't be pulling if off any better! Stay tuned for more teaser images to come because the group's full release won't be until July 1 at midnight (KST). What do you think of these new teasers from ASTRO?