AUDIENCES IN THIS NEW MUSICAL WHILE FORGING NEW GROUND ON THE GREAT WHITE WAY. >> Reporter: IT'S THE MUSICAL GENRE MILLIONS OF SCREAMING FANS CAN'T GET ENOUGH OF. >> BTS, BTS! >> Reporter: WHETHER IT'S BOY BAND JUGGERNAUT BTS -- ♪ >> Reporter: OR GIRL GROUP BLACKPINK -- ♪ >> Reporter: K-POP SWEEPING THE GLOBE. THE SOUTH KOREAN MUSICAL PHENOMENON HOPING TO FIND A NEW HOME HERE ON BROADWAY. ♪ SHE GOT ME BAD ♪ ♪ THAT I ALMOST CRIED ♪ >> Reporter: APTLY TITLED "K-POP," THE NEW MUSICAL FEATURES ACTUAL K-POP STARS, BROADWAY ALUMS, AND PERFORMERS WHO ARE BOTH KOREAN AND ASIAN AMERICAN. >> WHAT IS THIS LIKE, TO HAVE AN ESSENTIALLY ALL-ASIAN CAST AND ASIAN CREATIVES BEHIND THE SCENES AS WELL? >> ABSOLUTELY. HONESTLY, I WAS TAKEN ABACK. I'VE NEVER EXPERIENCED THAT BEFORE. >> IT FELT LIKE ALL OF US COULD TAKE A BREATH AND BE LIKE, OH MY GOSH, I'VE NEVER BEEN ABLE TO SPEAK KOREAN IN A ROOM. HERE WE KIND OF GET TO BE TOGETHER AND CELEBRATE. >> Reporter: I SAT DOWN WITH THREE OF THE CAST'S STARS WHO ALL GREW UP IN THE U.S., REAL-LIFE K-POP IDOL KEVIN WOO, FORMERLY OF THE BAND YOU KISS. ♪ STOP IN THE NAME OF LOVE ♪ >> Reporter: AMY KUM AND ZACHARY NOAH PISER WHO I MET A FEW MONTHS AGO WHEN HE BECAME THE FIRST ASIAN AMERICAN TO STAR IN THE BROADWAY SMASH HIT "DEAR EVAN HANSEN." >> I WAS, LIKE, ME? K-POP? ARE YOU SURE? I THINK I'VE LEARNED TO GROW TO LOVE IT. ESPECIALLY LEARNING FROM THE ACTUAL K-POP IDOLS WHO ARE IN OUR SHOW. IT'S BEEN SUCH A COOL EXPERIENCE. >> I'M GLAD I GET TO GET A LITTLE GLIMPSE WHAT WAS IT'S LIKE TO BE ON BROADWAY, ALSO BE IN MY OWN ELEMENT ON STAGE EVERY NIGHT. >> Reporter: THE SHOW REVOLVES AROUND ARTISTS ON THE FICTIONAL LABEL RUBY ENTERTAINMENT. WE FOLLOW BOY BAND FATE -- ♪ GIRL BAND ARTEMIS -- ♪ AND THE SUPERSTAR MUI. HER REAL-LIFE POP STAR NAME, LUNA. ♪ I WANT TO BE SOMEBODY ♪ >> Reporter: HERE AT THE CIRCLE IN THE SQUARE THEATER READY FOR THEIR NEW YORK DEBUT. >> K-POP FANS RIGHT NOW SEE THE GLITZ AND GLAM. BUT I REALLY LOVE HOW OUR SHOW PORTRAYS, LIKE, THIS DEEPER STORY. >> Reporter: THE SHOW PULLING BACK THE CURTAIN ON THE OFTEN TREACHEROUS ROAD TO BECOMING A K-POP IDOL. FAR FROM GLAMOROUS, IT DELVES INTO HOW GRUELING THE REAL-LIFE PROCESS IS. >> LET'S HOLD RIGHT THERE, HOLD RIGHT THERE -- >> Reporter: AND THE SACRIFICES NEEDED. >> TRY THIS ONE MORE TIME. >> IT'S NOT ONLY A K-POP CONCERT, IT REALLY DIVES DEEP INTO THE WORK ETHIC THAT KOREANS PUT INTO THEIR CRAFT. >> I GOT TO INTERVIEW BTS WHEN THEY WERE HERE AT THE U.N. WITH THE PRESIDENT. >> WOW. >> THEY TALK ABOUT THE LONELINESS OF BEING IN A BUBBLE WHILE THE REST OF THE WORLD IS FOCUSED ON THEM. >> THERE'S REALLY NO OTHER CAREER LIKE THIS. WE'RE BROUGHT UP INTO THIS WORLD A AT SUCH A YOUNG AGE. AND IT'S ALL THAT WE'VE EVER KNOWN. >> Reporter: THAT JOURNEY COLD THROUGH CATCHY K-POP MELODIES. HELEN PARK, WHO STUDIED AT NYU, NOW THE FIRST ASIAN AMERICAN FEMALE COMPOSER ON BROADWAY, HARNESSES THAT SIGNATURE BLEND OF BOTH KOREAN AND ENGLISH LYRICS. WERE YOU EVER AFRAID THAT MAYBE YOU MIGHT LOSE AN AUDIENCE MEMBER OR TWO? >> A LOT OF AUTHENTIC K-POP SONGS OBVIOUSLY HAVE BOTH KOREAN AND ENGLISH. A LOT OF THE TIMES THE LYRICS ACT AS, YOU KNOW -- EVEN LIKE SOUND EFFECTS. I KNEW THAT THERE'S GOING TO BE DIFFERENT SECTIONS, I WENT THROUGH THAT ALL MY LIFE. >> Reporter: IT'S NOT K-POP WITHOUT MANY COSTUME CHANGES. >> WELCOME TO OUR WARDROBE AREA. >> Reporter: 125 LOOKS, TO BE PRECISE. >> THIS IS MY OPENING LOOK, THIS IS MY KOREA. I WOULD LIKE TO TAKE THIS ON. >> Reporter: HERE'S WHERE IT ALL COMES TOGETHER. ♪ THIS IS IMMERSIVE. >> IT'S VERY, VERY INTIMATE. THE FRONT-ROW SEATS ARE LITERALLY IN FRONT OF OUR NOSES. >> Reporter: THE PERFECT SETTING FOR FRANK CONVERSATIONS. >> SPECIFICALLY, MY CHARACTER BRAD GETS TO REFLECT A LITTLE BIT OF WHO I AM, BECAUSE HE IS HALF ASIAN, HE IS HALF WHITE. SO WE GET THAT KIND OF CULTURAL DIVIDE BETWEEN THE GROUP, LIKE BETWEEN SPECIFICALLY THE BOY GROUP AND WITH BRAD. AND KIND OF LEARNING FROM THIS CAST, LIKE HOW TO SPEAK KOREAN, HOW TO GET INTO THIS K-POP WORLD, IT'S LIKE A META EXPERIENCE. BOTH ZACH IS LEARNING THAT AND ALSO BRAD IS LEARNING THAT IN THE SHOW AND GETS TO TALK ABOUT THAT EXPERIENCE. >> THERE'S THIS IDEA OF YOU'RE NOT ASIAN ENOUGH. >> OH, BOY. WE GET TO, THROUGH BRAD, SEE A LITTLE BIT OF THE HOPPA, THE MIXED-RACE EXPERIENCE THAT I'VE NEVER SEEN BEFORE ON BROADWAY. THAT REALLY UNIQUE FEELING OF BELONGING TO MULTIPLE IDENTITIES BUT NEVER QUITE FEELING LIKE YOU FIT IN WITH EITHER OF THOSE INTERSECTING COMMUNITIES. >> WHAT HAVE THE PREVIEWS BEEN LIKE? I'M SURE THE FANS ARE GOING BANANAS. >> I'M JUST SO ASTONISHED EVERY NIGHT TO SEE HOW DIVERSE OUR AUDIENCE IS. YOU'VE GOT YOUR THEATER FANS, THEN YOU'VE GOT K-POP FANS, WHICH IS REALLY NEW TO THE BROADWAY STAGE. BECAUSE THERE'S A LOT OF K-POP FANS WHO HAVE NEVER SEEN A BROADWAY MUSICAL. AND THEY COME TO OUR SHOW, THINKING IT'S LIKE A CONCERT, BUT THEN THEY'RE JUST LIKE, OH MY GOD, I'M CRYING. AND THEY'RE JUST --