Rookie boy group NEXZ is back with its second single “Mmchk,” underscoring JYP Entertainment’s evolving strategy to globalize the K-pop model through multinational lineups. The seven-member group held a showcase in Seoul on Sunday to mark the release of the single album at Blue Square Woori Bank Hall in Yongsan District. Formed through “Nizi Project Season 2,” a joint audition program between JYP and Sony Music Japan,