P1Harmony, “Killin‘ It.”

Nearly four years and six mini albums in, K-poppers P1Harmony finally deliver their first full-length album. Killin’ It is full of poppy earworms that stand on their own but fit nicely together and never overstay their welcome.

The sextet, which consists of idols Keeho, Jongseob, Jiung, Intak, Theo and Soul, is one of the most successful acts in the genre’s fourth generation. Impressively, they all contribute to the their own songwriting and arranging. Jongseob is a listed songwriter on each of the album’s 10 songs, joined most often by the Canadian-born Keeho, Jiung and Intak. One of the album’s strengths is the way the group blends two languages in addition to numerous musical influences.

Take “Let Me Love You,” which blends a funky bass line and synth that could have fit in a late ’80s or early ’90s Boyz II Men banger (think “Motown Philly”) with sung verses in Korean and English, and rapped breakdowns and chants of “I need your love” that will drive its fans, called P1ece, crazy.

The title track, which opens the album isn’t as memorable as past P1Harmony bangers but aptly introduces the album’s themes of emergence and success. It apropos, then, that it’s delivered with a hip-hop flow with 808 beat. The album’s Korean title is “때깔,” which translates as “slay,” and that word pops up in the positive proclamations of “I’m the boss/ I’m the man/ I’m the super, super, super–.” The rapped breakdown, again blending two languages, really pops here when words like “ambition” surface.

Other retro-rap-leaning songs include “Everybody Clap” (an expression of joy) and “Street Star,” which like the title track is meant as an ego or confidence boost.

Stacked in the middle of the album but not a surprise to fans who saw P1Harmony on their previous U.S. tour are three rock-centric tunes: “Countdown To Love,” “Emergency” and “2Nite.” Each features a driving beat with guitars prominent in the mix. The former includes the requisite rapped breakdown but is otherwise appropriately uptempo, with danceable and euphoric hooks, and repeated countdowns that seem to pick up the pace the closer they get to liftoff.

Similarly, “Emergency” features a musical range climbing exercise that has P1Harmony members reaching for their falsettos before coming back down over crunchy synths and a sound mimicking a siren. The latter song, “2Nite,” begins over palm0muted guitars and another funky bass line before opening up into an ethereal pre-chorus and drill-like snare drumming.

The remaining three tunes are more traditional R&B-infused ballads, with low bass, solo and gang vocals, and less prominent rap breaks. “Late Night Calls” includes acoustic-guitar-melodies below electronic percussion and vocalizations P1Harmony pulled from artists like Cardi B. The sweetest of the bunch is “Love Story,” on which the group’s harmonization is heard best. “I See U,” which closes Killin’ It, finds a balance between the two others. Dedicated to the group’s fans and thanking them for helping P1Harmony grow, the song borders on gospel with its organ synth.

What’s missing from this album is something the group couldn’t have possibly shown off here—its dancing prowess, which is among the best I’ve seen at K-pop shows. Luckily, P1Harmony doesn’t skimp on its videos, but for the full effect, the performance is best served up at a concert. U.S. concert promoters must have noticed, as the group will perform at the Governors Ball in New York in June.

Follow editor Roman Gokhman at Twitter.com/RomiTheWriter.