BIGHIT MUSIC's third boy group after BTS and TXT: five members who write, choreograph and film much of their own work. Their second EP, GREENGREEN, passed 4 million copies in September 2026.
2years on 18 August 2027 · in 300 days
Quick answers
When did CORTIS debut?
On 18 August 2025, with a showcase in Seoul and the title track "What You Want". The debut EP COLOR OUTSIDE THE LINES followed on 8 September 2025.
How many members does CORTIS have?
Five: Martin (leader), James, Juhoon, Seonghyeon and Keonho.
What is the CORTIS fandom called?
COER. It combines "COR" from CORTIS with "-ER" (those who stand together) and echoes the word "core". It was announced on Weverse in November 2025.
What does CORTIS mean?
The name is made of six letters taken from the slogan "Color Outside the Lines": thinking freely, beyond set rules.
Is CORTIS still active?
Yes. Their first tour, PUT YOUR PHONE DOWN, ended in Japan in September 2026, and they played the Formula 1 Singapore Grand Prix on 9 October 2026.
The story so far
Debut showcase in Seoul and release of the title track "What You Want".
Debut EP COLOR OUTSIDE THE LINES, with a music video for "FaSHioN".
The EP enters the Billboard 200 at No. 15.
Fandom name COER announced; Best New Artist at the MAMA AWARDS in Hong Kong.
Best New Artist in K-pop at the iHeartRadio Music Awards in Los Angeles.
Second EP GREENGREEN debuts at No. 3 on the Billboard 200; "REDRED" wins all five music shows in one week.
Record of the Year for "REDRED" at the KM Chart Awards, 11 months after debut.
Lollapalooza Chicago, a North American tour and a first-anniversary edition of GREENGREEN.
The tour ends in Kanagawa, Japan; GREENGREEN passes 4 million copies.
Start with these 5 songs
GO!The intro track of the debut, later No. 34 on Billboard's Pop Airplay chart.2025
What You WantThe debut title track: psychedelic rock guitar over a boom-bap beat.2025
FaSHioNTheir first music video to pass 100 million views on YouTube.2025
REDREDThe title track of GREENGREEN and a music show grand slam.2026
MOTIONA '90s Southern hip-hop single featuring Juicy J (official visualizer).2026
Videos play from YouTube, from the official channels, and load only when you press Video. YouTube may then set its own cookies (privacy).
In the Fan Chart
The Fan Chart on The Crowd adds up every fan's top 10. Here is where CORTIS stands.
The GREENGREEN track "Blue Lips" grew out of a song he wrote as a trainee.
James
제임스
Name
Chao Yufan
Born
14 October 2005
Worked on songs for TXT, ENHYPEN and ILLIT during his trainee years at BIGHIT MUSIC.
Juhoon
김주훈
Name
Kim Ju-hoon
Born
3 January 2008
Co-wrote the second verse of "MOTION", the 2026 single featuring Memphis rapper Juicy J.
Seonghyeon
엄성현
Name
Eom Seong-hyeon
Born
13 January 2009
Says the group sorted through more than 300 song candidates over two years before debut.
Keonho
안건호
Name
An Keon-ho
Born
14 February 2009
Role
Youngest member
Recalled how the treadmill set for the debut video grew from five machines to 11.
EPs
COLOR OUTSIDE THE LINESEP · title track "What You Want"All 6 songs
GO!
What You Wanttitle track
FaSHioN
JoyRIde
Lullaby
What You Wanttitle track
GREENGREENEP · title track "REDRED"All 6 songs
TNT
REDREDtitle track
ACAI
YOUNGCREATORCREW
Wassup
Blue Lips
"What You Want" came out on 18 August 2025, three weeks before the debut EP, with "GO!" as its intro track. "REDRED" was released ahead of GREENGREEN on 20 April 2026. The expanded edition GREENGREEN_playextended (24 August 2026) adds "PACK IT UP" and "MONEYMONEYMONEY". Also: the digital single "MOTION" featuring Juicy J (July 2026).