When I sat down for my first listen to NCT 127’s first full album, Regular-Irregular, I got about 30 seconds into the first song and paused. What was a hearing? Did this song sound suspiciously like EXO’s “Unfair”? (Yes it did.)

I was concerned. In fact I was so concerned that I quit Spotify and walked away.

It wasn’t until later that I gave the album a fair shot. But, like other books that I started a few times before getting invested in their plot and characters, Regular-Irregular just needed a little bit of time.

Unlike many k-pop albums, Regular-Irregular is arranged around a concept. The “dreamlike” concept has been with NCT the whole way through, so that’s nothing new, but I was not expecting 127 to come out of the gate with a fully-formed concept like this. It took EXO years of “singles” albums to refine a sound that worked for them enough to build a whole album around it.

This album is fantastic. It takes everything great about NCT 127 and remixes it into something new and utterly fun to listen to.

The first section is “Regular,” in which most of the songs sound like much of NCT 127’s earlier mini-albums. There’s the rap track (City 127), the bright pop song (Replay/PM 01:27), and the ballad (Knock On). None of these are unfamiliar, and once I pushed past my initial reluctance to the first track I breathed a sigh of relief. This is the NCT 127 that I know and love. Good rapping, smooth vocal harmonies. They’re good songs with some interesting moments, but nothing overly memorable.

Then we come to “No Longer.” This is the gem of the album. It’s a ballad, but in the style of an EXO winter album: the exact opposite of what NCT 127 usually does. (Seriously it would fit in perfectly with Universe.) The instrumental is acoustic, rather than synth-heavy. There is no urban or rap influence anywhere. This is a song that gives the vocalists time to shine, and they take advantage of it—especially Haechan. It immediately rocketed onto my unofficial list of k-pop songs to fall asleep to, it’s that soothing and complex and delicious.

Now that you’ve floated off into the land of vocal harmonies and upright bass, it’s time for the turn. This album is helpfully bisected by an “Interlude” that takes us from a sedate, classical beginning (regular) to a dark, distorted ending (irregular) with spoken-word poetryish stuff in between. Parts of this piece sound a horror movie, so I’m never sure if the IRREGULAR part of the album is supposed to be merely dreamlike or more like a nightmare. It’s a little bit unsettling, I won’t lie.

The journey is worth it, because it takes us to another of my favorite songs on the album: “My Van.” It’s very playful and all over the place, overscored by a metallic chiming synth and underscored by very deep distorted voices. This is another song designed to showcase rapping, giving some of the other members a chance to chime in even though Mark and Taeyong dominate. That’s okay though, they’re really good at it. (And Mark finally got his turn at vocal fry with a very well placed “Ahhhhhh yeah.”)

The second half of Regular-Irregular follows the same structure as the first. After the rap track (My Van), we get the bright upbeat pop song (Come Back), and the ballad (Fly Away With Me). Unlike the first half, however, these songs are more sonically interesting to me. Maybe it’s the distortion, maybe it’s a willingness to use chords that aren’t “regular,” but they’re very satisfying songs for someone like me who is a complete sucker for complex pop music. I particularly like “Fly Away With Me,” which is somehow light and heavy at the same time, with a four-on-the-flour beat that somehow never gets old.

If you’re more interested in the chords and rhythms, I highly recommend React to the K’s “First Listen” video, where Umu and Kevin react to and break down the album.

Technically “Fly Away With Me” is the last song on the album but much like “No Longer” was a complete left field surprise, we get a bonus track in the form of “Run Back 2 U.” If you need some NCT nostalgia, this is an expanded version of “Bassbot,” a dance video they released as undebuted rookies. It’s a gonzo song that jumps all over the place, has a female vocal sample, and ends abruptly—but I really like it. Something about k-pop has given me the ability to love and appreciate these songs that are just completely all over the place.

At this point, if you’re at all familiar with the album you might be wondering why I haven’t talked about the title tracks—the English and Korean versions of “Regular.” The short answer is, I don’t like it.

The long answer is a bit more nuanced. “Regular” reminds me a lot of the Twice song “Likey.” They are both very understated, and seem designed more to be played in shopping malls (and sound good) than for fans at concerts or at home streaming with headphones. Both songs are earworms, full of ear candy—Twice’s in audio effects, NCT 127’s in vocal color, think “splash” and “brrrrah.” It seems to me that SM Entertainment is more interested in laying the groundwork for future NCT 127 recognition than they are in providing a song that is immediately interesting to listen to. I respect that decision, even though I dislike the song. “Likey” grew on me. “Regular” has not.

With that said, I’m super-happy with Regular-Irregular as a concept and as an album. I like the back half a lot better than the front half—usually I start with “No Longer” (because I’m addicted) and carry through to the end—but it’s still a solid album from front to back. There are no bad songs, and it will integrate well into an all-NCT 127 playlist. (Except for maybe “Interlude” but that’s okay.)

Highly recommend, will be listening to on repeat, etc.