SuperM has arrived. It’s late afternoon in Los Angeles, and voices can be heard floating through the halls of Capitol Records in L.A., muffled and low. They’re just out of sight, but if the video teasers for the K-pop supergroup’s debut are to be believed, the seven members will turn the corner burning with a smoldering intensity, walking with the confidence of an elite squad of K-pop assassins trained to vaporize the competition with a single look. All have been hand-picked for this mission from some of K-pop’s most successful groups: Taemin from the legendary SHINee, Kai and Baekhyun from the record-breaking EXO, Mark and Taeyong from the massive 21-member group NCT, and Ten and Lucas from NCT’s Chinese subunit WayV. Together, they are an industry team of aces, pairing powerful performance with immense individual skill in dancing, singing, and rapping.

But as they find their seats around a massive marble conference table, they’re more like a bunch of brothers at summer camp. Kai, an often blush-inducing dancer, has pulled the arms of his sweater over his hands to create soft paws and is hiding behind them as he whispers to giggling rapper Lucas. Baekhyun, the group’s leader and stunning vocalist, scrunches his nose in frustration as he struggles to open a water bottle. One by one, each member relaxes into their chairs and widens the gap between their slick onstage personas and their sweeter offstage selves.

Taeyong looks softer than his icy rapper persona as he yawns and stretches, the blinding silver highlight on his cheeks catching the sun as he adjusts the waves of his purple hair. Ten, usually a brooding dancer, is disarmingly friendly. When a part of the conversation strikes him as funny, he looks around the room to find someone else who is laughing and wrinkles his nose at them as if to say, “Isn’t this all so silly?” Mark, the youngest, is usually the excitable little brother of NCT. But as SuperM’s strongest English speaker (he’s actually from Toronto, Canada, originally), he matures into a calm and collected translator and only ages down again when caught in a fit of laughter.

The member with the biggest gap between onstage and off is Taemin, the group’s most senior member in terms of experience, who was selected from one of K-pop’s foundational groups, SHINee, and boasts one of the most successful solo careers in the history of the industry. When performing, Taemin is wickedly villainous, sensual, and sophisticated. In a recent interview, Taeyong went so far as to describe Taemin’s stage presence as “a bit immoral.” But offstage, in this conference room, Taemin’s small frame is almost swallowed up by his chair. He likes to hold water in his cheeks so that they puff out like a fish, and his big, round eyes, which are usually narrowed for effect when he performs, stare blankly from beneath his shiny blonde bob. He is so quiet that he sometimes appears to not be paying attention at all, but then one of the other guys cracks a joke and his entire face lights up.

The group is in high spirits, coming off of an intense October weekend of stateside promotion that included their first official appearance as SuperM, the debut of the music video for their single, “Jopping,” the release of their eponymous debut mini album, and a performance for thousands outside of Capitol’s iconic headquarters in Hollywood. SuperM carries on the legacy of SM, one of K-pop’s oldest and most-revered entertainment agencies. “If you ask me, I’d say what the world now considers K-Pop began with SM Entertainment,” says Taemin, through an interpreter, as Ten nods in agreement. “SM was the very first company to take musical influences from Western culture and incorporate Korean culture into that by rearranging and writing lyrics with our style.” When Taemin finishes, he turns to Kai in embarrassment and says, “I’m too proud of SM, huh?” But Taemin is right; the company created what is considered to be the first modern K-pop idol group, H.O.T., in 1996, and has been a dominant player in the space ever since.

The guys don’t show it, but they are under an immense amount of pressure. SuperM was conceptualized and produced by the founder of SM, Soo Man Lee, and their staff notes that curiosities are piqued, even within the company itself. “I think people are interested in this new attempt because we are not newbies. Each of us are from groups that are already well-established,” says Baekhyun, the eldest. Kai agrees, “We feel obliged to live up to their expectations.” They don’t know it yet, but in a week they will have the no. 1 album in the United States.