If you just heard that a rookie boy group called CORTIS crossed 4 million album sales this week and wondered who they even are, you are certainly not alone in asking that question.
CORTIS is a five-member group under BigHit Music, the label behind BTS, and their second EP GreenGreen has just become the second album of 2026 to pass the 4 million mark, behind only BTS’s own ARIRANG. This piece explains who CORTIS are, what GreenGreen actually sounds like, and why this milestone matters even if you have never heard of the group before.
CORTIS’s second EP GreenGreen has sold roughly 4.1 million cumulative copies according to Circle Chart, becoming the second album of 2026 to top 4 million after BTS’s ARIRANG.
The EP sold about 2.31 million copies in its first week alone, a fivefold jump from the debut EP’s first-week sales of around 436,000.
Combined sales across CORTIS’s two EPs have now passed 6.4 million, just over thirteen months after the group’s debut.
Who is CORTIS
CORTIS is a five-member boy group under BigHit Music, the same label that manages BTS. The group debuted on August 18, 2025 with the digital single “What You Want”. The five members are James, Juhoon, Martin, Seonghyeon, and Keonho. Being signed to BigHit Music inevitably invites comparisons to BTS, and the label has clearly given CORTIS a fast track compared to most rookie groups: a debut single followed by two EPs and a run of chart placements within thirteen months is an aggressive release schedule for any new act.
James, born in 2005, is the oldest member and is of Thai and Chinese descent, while Martin has Canadian-Korean heritage and Keonho, born in 2009, is the group’s youngest member. That mix of backgrounds shows up in the group’s music, which blends English and Korean lyrics rather than sticking to a single language.
Inside GreenGreen
GreenGreen is CORTIS’s second EP, released on May 4, 2026 through BigHit Music, with the lead single “RedRed” released two weeks earlier on April 20. The record blends 1990s-style alternative rock with hip hop and EDM, and the group has said in interviews that they deliberately avoided sticking to one genre or sound while making it.
The EP debuted at number one on the Circle Album Chart, number two on Japan’s Oricon Albums Chart, and number three on the Billboard 200. Track “Acai” was inspired by the acai bowls the members ate daily during preparation, while “YoungCreatorCrew” grew out of a freestyle rap the members did together on their actual debut day.
How big is 4 million copies, really
To put the sales figures in context, it helps to compare GreenGreen against CORTIS’s own debut EP, Color Outside the Lines, released in 2025.
| Release | First-week sales | Cumulative sales |
|---|---|---|
| Color Outside the Lines (2025 debut EP) | about 436,000 copies | combined with GreenGreen, 6.4 million+ |
| GreenGreen (2026, 2nd EP) | about 2.31 million copies | about 4.1 million copies |
Only one other album released in 2026 has crossed the 4 million mark so far: BTS’s ARIRANG. For a group that debuted just thirteen months earlier, sitting in the same sales tier as BTS for even one album cycle is a genuinely rare outcome in the K-pop industry.
Not every critic is convinced
Sales numbers do not tell the whole story. Critical reception to GreenGreen has actually been mixed. AllMusic’s Matt Collar rated the EP 4 out of 5 stars, calling it inventive and high-energy. Music outlet Overtone landed in the middle at 3.1 out of 5, noting similarities to artists like ASAP Rocky and Frank Ocean.
Korean critic Han Seong-hyeon of IZM was considerably harsher, rating the EP just 2 out of 5 and arguing that CORTIS does not actually deviate from industry standards despite positioning themselves as different from typical K-pop. That gap between commercial performance and critical reception is worth keeping in mind before assuming the sales number alone settles the conversation about the group’s artistic direction.
Where CORTIS fits in the current K-pop landscape
CORTIS debuted into a K-pop market where fourth-generation groups already dominate global charts, and BigHit Music itself already has BTS, TXT, and Enhypen under its umbrella. Launching a brand-new boy group into that environment is a risk, since audiences could easily treat CORTIS as an afterthought next to the label’s established acts.
Instead, GreenGreen’s chart performance suggests the opposite happened, with the EP landing at number three on the Billboard 200 and number one on the Circle Album Chart. Achieving that within the same release cycle as an established powerhouse label’s other groups shows that CORTIS has built its own dedicated fanbase rather than simply riding on BigHit’s name. That distinction matters for how sustainable the group’s growth is likely to be going forward, especially since sophomore releases are usually where rookie groups either consolidate their fanbase or lose momentum entirely.
Why this milestone matters for new listeners
If GreenGreen is your entry point into CORTIS, the mixed critical reaction actually makes it a reasonable place to start rather than skip. The record intentionally jumps between alternative rock, trap-influenced hip hop, and 2000s-style electroclash, so a single listen gives a fairly complete picture of whether the group’s range appeals to you.
For listeners who want the fastest way in, “RedRed” is the title track built for radio and chart impact, while “Blue Lips” leans into a slower, more vulnerable register that shows a different side of the group. Together they bookend the range GreenGreen is trying to cover. If you want to go deeper on who is behind the group’s rapid rise, we covered the members individually in an earlier piece on their Billboard chart run.
CORTIS GreenGreen Frequently Asked Questions
How many members does CORTIS have?
CORTIS has five members: James, Juhoon, Martin, Seonghyeon, and Keonho, all under BigHit Music, the label that also manages BTS.
When did CORTIS debut?
CORTIS debuted on August 18, 2025 with the digital single “What You Want”, making GreenGreen’s 4 million milestone something the group reached in just over thirteen months.
What does the title GreenGreen mean?
The EP uses the colors green and red, shown through lead single “RedRed”, to represent things the group likes and dislikes. The title itself does not refer to a single song meaning but to that color concept across the record.
Is GreenGreen the best-selling album of 2026?
No. Only one 2026 release has sold more: BTS’s ARIRANG. GreenGreen is the second album of the year to cross 4 million cumulative copies, and the only one to do so from a group that debuted less than two years earlier.
Did critics like GreenGreen?
Reviews were mixed. AllMusic rated it 4 out of 5, Overtone gave it 3.1 out of 5, and Korean outlet IZM rated it 2 out of 5, arguing the group does not deviate much from typical K-pop conventions despite their stated intentions. That spread of scores is unusually wide for a single release, which itself says something about how differently domestic and international critics are reading the same record.
What genre is GreenGreen?
The EP blends 1990s-style alternative rock with hip hop and EDM elements, moving between a trap beat on “TNT” and 2000s electroclash textures on “RedRed” rather than staying in one lane.
