CORTIS "GREENGREEN" EP Review

"GREENGREEN" Album Art

Sanne Boere | May 2026

CORTIS have always felt a little different from the wave of polished rookie groups currently flooding K-Pop. The five-member crew, consisting of Martin, Keonho, Seonghyeon, Juhoon, and James, moves more like a friend group accidentally becoming stars, rather than idols carefully assembled in a boardroom. That chemistry is one of the reasons their second EP “GREENGREEN” is so addictive. 

Since debuting, the group has built their reputation around chaotic creativity: self-aware humour, internet-brainrot references, restless production, and the feeling that every song was made during a sleep-deprived 3 am studio session with too much caffeine involved. 

Even before “GREENGREEN,” CORTIS were already becoming one of those groups impossible to escape online. Previous releases like “GO!” and “FaSHioN” spread rapidly across TikTok thanks to their instantly recognisable choreography and chaotic, youthful energy. 

“GO!” in particular became one of those rare rookie-group songs that escaped fandom spaces completely, with everyone from other idols to casual listeners joining the dance challenge. “FaSHioN” kept that momentum going, especially after BTS’ Jungkook posted himself dancing to a remix of the song on TikTok, a video that exploded to tens of millions of views within a day and pushed the track into viral territory even further. 

And of course, there’s “REDRED.” Even people who couldn’t name all five members probably recognise the song or its choreography. The track quietly exploded across TikTok, with the “green, green / that’s red, red” dance challenge becoming one of those rare K-pop trends that expanded beyond the K-pop borders. Everyone was doing it; dancers from Western and Asian groups, influencers, random friend groups, the list goes on and on. That virality could’ve easily overshadowed the rest of the EP, but “GREENGREEN” proves CORTIS are far more than one or two catchy trends.

From the very first seconds of “TNT,” the group establishes the project’s mission statement: loud ambition, youthful recklessness, and absolute trust in their team. The opening line “열여섯, 여전히 모지리 / 방구석 매일 밤“ (translation: “Sixteen, still just clueless kids / Five brats in a room every night”) paints the image of teenagers holed up in bedrooms making music before anyone believed in them. It’s nostalgic without sounding sentimental. The production genuinely feels explosive too, especially during the “bring the fire, 마치 TNT” (translation: “just like TNT”) refrain, where the bass hits like it’s trying to burst through the speakers.

What makes “TNT” work so well is how cinematic it feels. They reference Seoul nightlife, airport runways, missiles flying from “N.Y., L.A., Tokyo”, making their dreams sound huge and slightly out of control. It captures that rookie-group hunger perfectly: the eager feeling of wanting the entire world immediately.

Then comes “REDRED,” the undeniable centrepiece of the EP. The song is basically a manifesto for the CORTIS mindset: stop hesitating, stop caring what other people think, stop living cautiously. Anything boring or overly self-conscious is “red red”; while freedom, movement, and chaos are “green green.”

The lyrics are deceptively clever. Beneath the playful chants and addictive hook, there’s a real rejection of conformity. Lines like “눈치나 살피기 / That’s red, red” (translation: “Playing it safe / That’s red, red”) criticise constantly watching others for approval, while “넘어가 울타리 green, green” (translation: Hopping the wall, that’s green, green) encourages crossing boundaries instead. 

Musically, the track is impossible to sit still to. The beat swings between laid-back cool and total frenzy, mirroring the group wandering the city with friends before ending up back in the studio “cookin’ up ‘til we get stinky.” That lyric alone feels very CORTIS, unserious but weirdly vivid. You can practically smell the sweat and instant ramen in the recording booth. 

“ACAI” might be the strangest song on the EP – which is exactly why it works. On paper, a track obsessing over açaí bowls sounds ridiculous. In execution, it becomes this hyperactive metaphor for trends, hunger, and creative addiction. Purple smoothies become status symbols, fuel sources, and personality traits all at once.

The repeated imagery of travelling endlessly, checking into hotels and chasing the next session gives the song more depth than expected. Underneath all the absurdity, “ACAI” is about wanting something authentic in a world full of “근본 없는 topping” (translation: “topping with no roots”). CORTIS constantly frame themselves as people searching for the real thing, whether that’s music, friendship or identity. 

“YOUNGCREATORCREW” is probably the most on-point song CORTIS could make. It’s chaotic, unserious and borderline meme music at points, but there’s genuine confidence underneath the jokes. The repeated “영크크“ (translation: “Young Co-Co” /YCC”) hook feels intentionally stupid in the best way possible, almost like an inside joke.

The track also highlights one of the group’s biggest strengths: their chemistry. You fully believe these five are friends making each other laugh in the studio. The random teppanyaki (a style of Japanese cuisine), “감튀남“ (which roughly translates to “the fry guy,” referring to member Keonho, who went viral for eating French Fries), and yelling over each other shouldn’t work this well, but they do because the energy feels completely natural.

“Wassup” slows things down slightly and ends up becoming one of the EP’s emotional anchors. Beneath the cool exterior is a surprisingly exhausted song about constant movement. Airports, cramped vans, and hotel rooms turning into makeshift studios – it’s the least glamorous version of idol life possible. 

Lines like “다섯 명의 바퀴 달린 bedroom” (translation: “A bedroom with wheels for five people”) are especially memorable because they communicate so much with so little. There’s loneliness hidden inside the confidence of the chorus. Even when they say “Every time you see me, know wassup,” there’s an underlying sense that they barely know where they are themselves anymore. It’s subtle, but effective.

The closing track, “Blue Lips,” is easily the most vulnerable moment on the project. Gone are the explosive chants and internet humour; instead, the group dive into burnout, uncertainty and emotional exhaustion. The pool imagery running through the song is beautiful: drowning, holding your breath, and staying underwater because leaving means loving someone. 

James and Seonghyeon’s verse especially stands out: “Dreams feel elusive, but what else do we got?” summarises the emotional core of “GREENGREEN.” Beneath all the jokes, chaos, and viral choreography, this EP is really about five young artists chasing something bigger than themselves while trying not to lose who they are in the process.

What makes “GREENGREEN” special is that it never feels overly calculated. A lot of K-Pop projects try desperately to sound youthful; CORTIS actually are youthful, and that authenticity bleeds into every track. The EP is messy at times, random constantly, and occasionally feels like five different inside jokes stitched together, but that’s exactly its charm. 

CORTIS understands something many newer groups forget: personality matters just as much as perfection. And if this is only their second EP, we can already tell that there’s much more for them in store. 

Listen to “GREENGREEN” here!

Follow CORTIS here!