With P1Harmony‘s new album Sad Song released on Friday (Sept. 20), the K-pop boy band continues to rise in creative maturity and chart success. Last summer’s Harmony: All In debuted at No. 51 on the Billboard 200 to mark the group’s first appearance on the albums chart, while their first full-length LP Killin’ It, released in February, peaked at No. 40 entry and secured their first No. 1 on Billboard’s World Albums chart. The Christopher “Tricky” Stewart–produced “Fall in Love” earned them a certified top 40 on the Pop Songs airplay chart and, now, the sextet is taking even bigger steps—on stage as well as behind the scenes.

For Sad Song, P1Harmony took a more hands-on approach than ever. “We’ve never been this involved with an album before,” the group’s leader Keeho explained to Billboard during an early album preview in Los Angeles. “It’s a huge stepping stone from the other albums."

Keeho and his band mates Jiung, Theo, Intak, Soul and Jongseob say the late-summer weather of September marked the perfect chance to finally experiment with Latin music on the title track single, while the EP also brings their first sub-unit track with “WASP,” a standout rap cut performed by Intak and Jongseob.

“Now that we’re becoming more senior, we’re starting to hear the company listening to what we have to say and trusting us a lot more,” Theo says of working closer with their agency, the influential K-pop agency and talent management firm FNC Entertainment. “I’m in a much more comfortable of a position to really talk to our in-house staff about what we want to do .”

Beyond the actual music itself, Intak stepped up to help develop the stage choreography for “Sad Song” (“I really wanted to capture, ‘How can we look more emotionally invested?'” he says). At the same time, Theo’s expanding role into a musical director of P1Harmony’s live shows specifically inspired Jiung to produce the EP’s rock concert anthem, “Last Call.”

As P1Harmony look to climb higher on the charts, diving deeper into their creative instincts is producing more confident and comfortable energy in the boy band who aren’t afraid to speak up for their interests without abandoning what has made them unique since Day 1.

Read on for more into P1Harmony’s process of producing their latest EP, Sad Song.

Billboard: Tell us about “Sad Song” and how this title track single fits within the album?

Keeho: I’m sure you already know, but P1Harmony loves to experiment with new genres and try to mix in different types of vibes. I feel like we never want to stay in one place. We’re always trying to move around, but also add P1Harmony’s color into it, right? The whole Latin inspiration was something that we really wanted to experiment with and I feel like we really brought it out with this title track [single]. It’s out in September so I feel like it’s right when it’s still warm, but starting to get cooler — I feel like with the weather’s vibe, it’ll just suit the song so well.

Especially with this album, we did a lot, a lot, of experimenting within the the songs in the album as well too. We’ve never been this hands-on with an album before. It’s a learning curve, so we’re also very scared. We have one song called “WASP,” which is Intak and Jongseob’s [as a] sub-unit, so the two of them are just rapping. Actually, it’s one of my favorite songs on the album. You’ll listen to the album and it’ll be a completely different vibe. So, it’s like really cool that they have that in there. Also, Jiung and I did separate songs for the album. He did “Last Call,” and I did “It’s Alright.” Mine is a little bit of a reggae-like guitar vibe, but he is more like a band guitar vibe.

On the albums before, we usually only had one song where we would be very involved in its production, but this time, we’ve had three. So, it’s a huge stepping stone from the other albums; we’re really excited to see what the fans are going to think. I’m a little scared, but we’re really, really excited. And this is the first time where our mini album has seven tracks. So we’re including the English version of “Sad Song” in the album as well, so that’s three out of seven tracks that we are very deeply — like whole foot in — involved.

But P1Harmony has always been involved in music, especially when it comes to songwriting. What was so different this time?

Keeho: Before, I think it was more like, “We want to have a song that’s this vibe” and we kind of just write to the tracks. But this time, we were really in the structure of it, so we talked to producers and were like, “This is a vibe we want, this is a melody we want,” and we would actually be in the song camps with like other really great amazing writers and producers. We would sit down with them, bounce off each other’s ideas and really be a part of this song-making process. Whereas [the past] was kind of like, “This is the vibe; you guys kind of just write on top of it.” And I feel like Jiung and Jongseob also have a lot to say about it because, while I wouldn’t say they were restricted, I would say that there’s definitely a limit to what they wanted to do creatively. But I feel like this time they were allowed to kind of run wild and be able to really just do what they want. This is our first time having a unit song as well, in general, too; I mean, creatively, they gave us a lot of freedom this time.

Jiung: Actually, I talked a lot about our album with Theo. Because he does a lot of things for the stages of our concerts and tours. So, I asked him, “What do we need for our concert? What do we need for the next tour?” he said, “We need a song that can hype people up — make people enjoy us on stage even more and just jump.” I then made the concept of the song [“Last Call”], then I talked with our producer and the top liner from the very beginning of the process. Knowing that we would use it for a certain occasion, it was a lot easier for me to create my song and map out what I wanted to make sonically. Theo is really the one who sets up our whole setlist for our tours and conceptualizes and creates the whole show.

Theo, have you always been interested in musical direction, or is this a role you naturally stepped into?

Theo: I’ve always been interested in musical directing and loved the idea of musical shows and concerts. It’s not something I did out of the blue, but I’ve been coming up with ideas and communicating with the company since the beginning. And now that we’re becoming more senior, we’re starting to hear the company listening to what we have to say and trusting us a lot more in what we want to do for shows, so a lot of my ideas have come to life. Now, I’m in a much more comfortable of a position to really talk to our in-house staff about what we want to do for our next tour, the current tours, and what we’re doing right now. I think we’re gradually expanding our horizons.

Keeho: Yeah, they’re really listening a lot now, and Theo is always at the forefront of that.

I love that. Sad Song is your seventh mini album. Previously, you had three Disharmony EPs, three Harmony EPs, Killin It was a full album. Is this the beginning of a new era or trilogy?

Keeho: I think our trilogies, like Harmony and Disharmony, and then what’s happening after Killin’ It are very two different things. I had talked to our people because I’m a part of a lot of the visualization and conceptualizing of the albums. With the storytelling aspect of it, I told our company that it’d be really dope to not make trilogies anymore but kind of make it, like, a standalone project each time. That way for each album, we can really bring in something new and different without having to feel like we need to tie everything together. It gives us more freedom to creatively create something new just for the album without having to be like, “Okay, but how is this going to tie into ‘Killin’ It’?”

Visually, it’s very different too. But as you know, we debuted with a movie and the whole story of the six of us being superheroes that are coming together to save the world figuratively, and also literally at the same time with our music, I wanted to keep that concept going. So, even if the songs and the concepts are different, I still wanted to bring [the idea] that we’re still superheroes. Visually, I think you’ll be able to see it in the music video and the concepts. That’s the one thing that we’re keeping consistent.

Tell me about creating the choreography and what we should look out for?

Soul: By the time of KCON in July, we had learned all the choreography for Sad Song tracks. Difficulty-wise, “Sad Song” is not that difficult compared to our other releases because I feel like in the chorus, there’s a simple point choreography that anyone can really just look at and kind of understand. Intak was very involved in how the choreography was made this time.

Intak: Yeah, when I listened to the song, I really wanted to capture, “How can we look more emotionally invested in the stage?” So, I thought about how it’s called “Sad Song,” but there’s also a lyric where it says “mad song,” and we repeat those two lyrics a lot. When creating the choreography, I wanted to be able to portray that on stage as well so that when people see they can just understand the sadness and the madness in the choreo. I talked to our performance director back in Korea and we really kind of curated this choreography to hopefully portray that emotion.

Keeho: And if I put my little two cents in, we actually get “skeleton” choreographies from, like, four different dance teams. That’s what’s really fun about K-pop. I don’t know if other people do it too or if other dancers do it, but we’ll pick out choreographers that we really think are super cool and good at what they do, and ask them to create a choreography for the song. Then, we’ll have four different choreographies for the same song. And Intak and the creative director would then sit down, look at the videos, and sort of mix and match to see which choreo suits us best and how we can make it better, right? Intak was super, super involved in that process.

I remember when P1Harmony started, you shared how it was very important for you not to lose yourselves or feel like you’ve sold out. As you go more global and experiment with different genres, how have you stayed true to yourselves?

Keeho: Honestly, I don’t think it’s that difficult anymore. I feel like it’s become really simple and easy for us because we really understand that no one can be us — and we can’t be anyone else. As long as we’re really in tune with what we think is cool, what’s hot, and what we feel is good, that automatically becomes P1Harmony.

So, no matter what you throw at us — it can be rock, pop, R&B, jazz, Latin — if it goes through us, it still comes out as P1Harmony. And I feel like that’s so simple and easy now because we’re so confident and so in tune with what we know our strengths and our weaknesses are; I feel like it’s not something we have to think about; whatever we do, there’s always that feeling of P1Harmony in there.

Since we’re almost four years into our careers now, I feel like it’s more of a subconscious thing. A couple years ago, I would be like, “Okay, how do we make this ours?” or “If this is this experimental, how do we make it without sounding like someone else?” That was always something in the back of our heads, but now it’s coming through subconsciously.