Tomorrow x Together Talk Rocking Out, Voguing and Why They Loved Making Their New Album (Exclusive)

The themes of Tomorrow x Together's latest album may be about facing the realities of adulthood, but making it was a sweet indulgence for the K-pop stars — and listening is sure to be one for their fans.

The 10 tracks on the group's third full-length album, The Name Chapter: FREEFALL (out Oct. 13), represent an almost shockingly diverse range of genres, from indie rock and new wave to disco and metal. Yes, metal.

Getting to experiment with their sound and break out of some pop stereotypes, they say, was their favorite part of the process. "We really love to try out new genres and I think that's why a lot of people are enjoying our songs," Hueningkai, 21, tells PEOPLE.

"I think nothing's more fun than experimenting with a new genre. We don't want to be confined to a single one," Taehyun, 21, adds. "I think we have our own team color and we can put our color into different genres, so I want to go down this path and keep on trying new ones."

The five-member group — which also includes Soobin, 22, Yeonjun, 24, and Beomgyu, 22 — have dabbled in more rock-influenced songs in the past, in particular on The Chaos Chapter: FREEZE, which spawned the head bang-worthy "0X1=LOVESONG (I Know I Love You)." But the opening track of FREEFALL, "Growing Pain," goes much harder.

Asked if there was a secret metalhead among their ranks, Hueningkai speaks up immediately. "When we were trainees, I used to listen to lots of Linkin Park music. I love band music and metal as well, so that's why I think I really adore the first track of our album,"

"I think it's everyone. Rock never dies," Taehyun chimes in, throwing up two devil horns.

Their latest single, "Chasing That Feeling," is just about the antithesis: a driving, synth-filled '80s pop track that would feel at home as an OST for Stranger Things. The song also provided the group with the opportunity to try out another new genre — this time, in dance.

"For the choreo of our lead track, we added some voguing into the dance. I think that was a new challenge," Yeonjun explains.

"Back for More," their collaboration with Brazilian superstar Anitta, has a decidedly disco vibe, which they were able to showcase at the MTV VMAs in September. While they were "a little bit nervous because we were performing our pre-release song for the first time," says Soobin, he got a boost of confidence from a famous friend.

Bebe Rexha, who was also in attendance, and Soobin become friendly after realizing they were mutual fans. So when his nerves flared up at the award show, he says, "Bebe would smile at me, and it felt like somehow she's rooting for me without speaking. I think I kind of relied on her and I was very thankful for her energy."

Their most memorable performance of the summer, however, was likely in Chicago, where they headlined Lollapalooza, a festival they'd performed at for the first time on a smaller stage just last year.

"I think it was very meaningful that we got to showcase our songs and our music to a bigger crowd. It's our second time around, so I think we had more fun and we were enjoying the stage more," Hueningkai says. "I remember that [the fans] were using their flashlights on their phones to make the light for us, so that was something that I will hold dear to my heart."

The group involve their fans in every part of their work — not just when performing in front of them, but keeping them at the center of the creation of their music as well.

While the members were involved in composing and writing the songs on this album, as they have for their previous releases, one track stands out as incredibly personal to the group: "Blue Spring," a song composed for their fans, known collectively as MOA (for Moments of Alwaysness).

"I wrote the track for the song, and all of the members participated in writing the lyrics," Beomgyu says. "I think that's why we could really tell MOA it's about how we feel about them. I think it's really special that we get to write our own songs and talk to MOA straight out of our hearts."

The Name Chapter: FREEFALL is available to stream now.