ure ▁to ▁be ▁one ▁of ▁the ▁summer ' s ▁K - pop ▁ear w orm s ". ▁Jeff ▁Benjamin ▁of ▁F use ▁magazine ▁described ▁the ▁song ▁as ▁a ▁" super - simple - to - sw allow ▁piece ▁of ▁pop " ▁and ▁wrote ▁that ▁the ▁album ▁consists ▁of ▁five ▁' fe el - good ' ▁tracks . ▁" You ▁Better ▁Know " ▁is ▁a ▁warm ▁ED M ▁song . ▁The ▁tropical ▁dance ▁track ▁" Z oo " ▁is ▁a ▁throw back ▁to ▁the ▁group ' s ▁animal ▁sound - inf used ▁debut ▁single ▁" H app iness ". ▁" M oj ito " ▁was ▁defined ▁as ▁a ▁sac char ine , ▁gl oss y , ▁elect rop op ▁song ▁and ▁last ly , ▁" H ear ▁the ▁Sea " ▁is ▁a ▁mid - tem po ▁R & B ▁track . ▁ ▁Release ▁and ▁promotion ▁On ▁June ▁ 2 3 , ▁ 2 0 1 7 , ▁S . M . ▁Entertainment ▁announced ▁that ▁Red ▁Vel vet ▁would ▁be ▁re le asing ▁an ▁album ▁in ▁July ▁for ▁a ▁summer ▁com eb ack ▁( a ▁first ▁for ▁the ▁group ) ▁and ▁had ▁recently ▁finished ▁film ing ▁the ▁music ▁video . ▁At ▁around ▁mid night ▁on ▁June ▁ 3 0 , ▁the ▁first ▁set ▁of ▁te aser ▁images ▁were ▁released ▁through ▁the ▁company ' s ▁official ▁website , ▁the ▁group ' s ▁official ▁Inst agram , ▁and ▁the ▁group ' s ▁prom ot ional ▁Twitter ▁account , ▁which ▁was ▁created ▁the ▁same ▁month . ▁Later ▁that