If you are searching for the members of Cortis, you are looking for more than just a list of names. CORTIS is a five-member South Korean boy group under BIGHIT MUSIC, known for taking an unusually hands-on approach to music, choreography and visual production.
The group consists of MARTIN, JAMES, JUHOON, SEONGHYEON and KEONHO. Rather than relying on strictly separated creative roles, the members work together across songwriting, composition, choreography and video production. BIGHIT MUSIC describes them as a young creator crew whose work is built around individuality, experimentation and self-expression.
This guide explains who the members are, what is publicly known about them, how they contribute to CORTIS and what makes the group different from a conventional idol lineup.
Key Takeaways
- CORTIS is a five-member boy group under BIGHIT MUSIC.
- The members are MARTIN, JAMES, JUHOON, SEONGHYEON and KEONHO.
- MARTIN is the group’s leader and has a strong role in music production.
- The members contribute collectively to songwriting, composition, choreography and visual production.
- Their debut EP, COLOR OUTSIDE THE LINES, highlights the group’s collaborative creative approach.
- CORTIS was introduced as a group focused on creating its own identity rather than following a predetermined formula.
Main Article
Who Are the Members of Cortis?
The members of CORTIS are:
- MARTIN
- JAMES
- JUHOON
- SEONGHYEON
- KEONHO
CORTIS is a five-member group formed by BIGHIT MUSIC. The group’s official material emphasizes that all five members participate in creative aspects of their music and performances rather than being limited to narrowly defined positions.
Their name comes from the phrase “COLOR OUTSIDE THE LINES.” The concept reflects the group’s intention to think independently and move beyond conventional expectations.
The group officially debuted in August 2025, beginning its career with “What You Want.” Its first EP, COLOR OUTSIDE THE LINES, followed in September 2025. The EP contains five main tracks: “GO!,” “What You Want,” “FaSHioN,” “JoyRide” and “Lullaby.”
CORTIS Members at a Glance
| Member | Known Role or Contribution | Notable Creative Focus |
|---|---|---|
| MARTIN | Leader | Music production, songwriting and group direction |
| JAMES | Member and creative contributor | Choreography and collaborative production |
| JUHOON | Member and creative contributor | Songwriting, performance and group collaboration |
| SEONGHYEON | Member and creative contributor | Lyrics, music and creative ideas |
| KEONHO | Member and creative contributor | Music, performance and detailed creative input |
It is important to note that CORTIS does not appear to operate around a rigid set of traditional idol positions. The members frequently contribute together, making “creative contributor” a more accurate description than assigning every member one fixed specialty.
MARTIN
MARTIN is the leader of CORTIS and one of the group’s central creative figures.
His involvement extends beyond performing. In interviews about the group’s creative process, MARTIN has discussed taking the lead in music production while working with the other members to develop songs, choreography and ideas. He has described CORTIS as a group in which individual ideas are combined rather than created in isolation.
This collaborative approach can be heard across the group’s debut material. BIGHIT MUSIC specifically notes MARTIN’s production involvement on “Lullaby,” while all five members participated in the broader creative process behind the debut project.
As leader, MARTIN therefore has a role that combines performance, musical creativity and group coordination.
JAMES
JAMES is another key member of CORTIS and contributes to the group’s creative identity.
One of the most notable aspects of CORTIS is the way its members work across disciplines. Rather than separating performers from the creative process, the group incorporates member ideas into choreography, music and visual projects.
MARTIN has explained that JAMES helps bring together choreography ideas developed collectively by the members. This illustrates how the group approaches performance as a shared creative process.
JAMES is also credited on the group’s debut material. For example, BIGHIT MUSIC identifies JAMES as a contributor to “Lullaby,” alongside MARTIN and SEONGHYEON.
JUHOON
JUHOON is the youngest member of the group’s creative lineup alongside the other younger members and is an important part of CORTIS’s collaborative identity.
According to MARTIN’s interview with Weverse Magazine, JUHOON joined the group later than some of the other members. MARTIN described him as someone who maintains a balance within the group and follows through seriously when he decides to develop a skill or pursue an idea.
JUHOON also contributes to CORTIS’s music and group projects. Rather than functioning solely as a performer, he participates in the wider creative environment that defines the group.
This collaborative model is particularly visible on the debut EP, where the members collectively contributed ideas across music and performance.
SEONGHYEON
SEONGHYEON is one of CORTIS’s members involved in the group’s songwriting and creative development.
His contribution is especially relevant to the group’s emphasis on personal expression. MARTIN has discussed SEONGHYEON as someone who is direct about his ideas and maintains his own creative style instead of simply following what others are doing.
SEONGHYEON is also credited alongside MARTIN and JAMES on “Lullaby.” The track demonstrates the broader philosophy of CORTIS, with members contributing to the creation rather than simply performing material prepared entirely by outside writers and producers.
KEONHO
KEONHO is the fifth member of CORTIS and contributes to the group’s music and creative development.
In discussing the group’s working process, MARTIN described KEONHO as someone who tends to think carefully about details and offers specific feedback. That makes his contribution valuable during the development and refinement of group ideas.
KEONHO is also part of the collaborative songwriting and production approach seen throughout CORTIS’s debut work.
The official material for COLOR OUTSIDE THE LINES confirms that the members collectively participated in the creation of the project. This approach helps explain why CORTIS is frequently presented as a group of young creators rather than simply a performance-focused idol team.
Do CORTIS Members Have Fixed Positions?
CORTIS is notable because its members are not defined only by traditional positions such as vocalist, rapper or dancer.
Instead, the group emphasizes shared creative participation.
The members have contributed to areas including:
- Songwriting
- Composition
- Music production
- Choreography
- Music video production
- Performance
- Creative direction
BIGHIT MUSIC states that all five members are credited across COLOR OUTSIDE THE LINES and participated in choreography and music-video production.
That does not mean every member performs exactly the same function on every song. Their contributions vary depending on the project. The important distinction is that CORTIS’s creative identity is built around collaboration rather than rigidly assigning one creative responsibility to each person.
How the Members Work Together
The collaborative nature of CORTIS is one of the group’s defining characteristics.
MARTIN has explained that the members exchange ideas during the creative process. One member may begin with a musical idea, another may suggest changes, and the group can then develop those ideas into choreography or additional musical material.
This process can be summarized as:
- An idea begins with one or more members.
- Other members contribute suggestions.
- Music and performance ideas develop together.
- The group refines the concept collectively.
- The final work reflects contributions from multiple members.
This approach is particularly significant for a young group because it gives CORTIS a recognizable creative identity from the beginning of its career.
CORTIS and COLOR OUTSIDE THE LINES
The debut EP, COLOR OUTSIDE THE LINES, provides a useful introduction to the group’s musical direction.
The project contains five main tracks:
| Track | General Creative Direction |
|---|---|
| “GO!” | Hip-hop and pop influences with a bold introduction |
| “What You Want” | Psychedelic rock elements combined with boom bap |
| “FaSHioN” | Trap and Southern hip-hop influences |
| “JoyRide” | Alternative rock and pop elements |
| “Lullaby” | Psychedelic soul and experimental guitar textures |
BIGHIT MUSIC says the members worked on more than 300 songs over approximately two years while developing the project and eventually selected five tracks that best represented CORTIS.
That preparation helps put the group’s creative involvement into context. Their debut was not simply presented as a collection of songs chosen for them; the official description emphasizes the members’ participation in shaping the project’s music, choreography and visual material.
Why the Members Are Important to CORTIS’s Identity
A group’s identity is often influenced by its members’ individual personalities, skills and creative interests. For CORTIS, that connection is especially important because the members are involved in the creation of the group’s work.
The group’s concept centers on moving beyond established expectations. That idea is reflected not only in the name COLOR OUTSIDE THE LINES but also in the way the members participate in different stages of production.
Instead of asking which member performs only one particular task, it can be more useful to understand CORTIS as a team where different members bring different ideas to the same project.
This distinction is important for new fans researching the members of Cortis, because online profiles sometimes reduce artists to simplified labels. The group’s official material provides a broader picture: five members contributing to a shared creative process.
CORTIS’s Debut Music
The group’s debut single, “What You Want,” established an energetic and unconventional musical direction. BIGHIT MUSIC describes the track as combining 1960s psychedelic-rock guitar sounds with boom-bap hip-hop rhythms.
“GO!” was also an important introduction to the group. The song combines trap-oriented production with strong synth textures and hip-hop and pop influences.
Other tracks on the debut EP demonstrate the group’s willingness to explore different sounds. “FaSHioN” draws on trap and Southern hip-hop, while “JoyRide” incorporates alternative rock and pop. “Lullaby” takes a more atmospheric approach through psychedelic soul and experimental guitar work.
This variety makes the members’ creative involvement particularly relevant. CORTIS’s early catalog does not depend on one narrowly defined sound.
What Makes CORTIS Different?
Several characteristics distinguish CORTIS from a conventional newly debuted K-pop group.
A Strong Creative Role
The members are involved in music, choreography and visual production. This gives them a direct connection to the material they perform.
Collaborative Rather Than Rigid Roles
The members do not need to remain within one fixed creative category. They can contribute ideas in different areas depending on the project.
A Clear Group Concept
The phrase “COLOR OUTSIDE THE LINES” captures the group’s emphasis on individuality and independent thinking.
Early Hands-On Experience
The official account of the debut project says the members spent around two years creating and developing music before selecting the songs for their first EP.
Together, these elements provide a foundation for CORTIS’s identity as a young group with a strong interest in creative participation.
Frequently Asked Questions
How many members does CORTIS have?
CORTIS has five members: MARTIN, JAMES, JUHOON, SEONGHYEON and KEONHO.
Who is the leader of CORTIS?
MARTIN is the leader of CORTIS. He also has a prominent role in the group’s music-production process.
Who are the youngest members of CORTIS?
SEONGHYEON and KEONHO were born in 2009, making them the youngest members based on the publicly available birth dates listed by Weverse.
Which company manages CORTIS?
CORTIS is managed by BIGHIT MUSIC, the HYBE label also associated with BTS and TOMORROW X TOGETHER.
Do the members of CORTIS write their own songs?
Yes. The members participate in songwriting and composition, and the official debut material credits all five members across the project.
Do CORTIS members participate in choreography?
Yes. BIGHIT MUSIC states that all five members participated in choreography for their debut project.
What was CORTIS’s debut album?
CORTIS’s first EP is COLOR OUTSIDE THE LINES. It contains five main tracks, including “GO!,” “What You Want,” “FaSHioN,” “JoyRide” and “Lullaby.”
What does the name CORTIS mean?
The name CORTIS is derived from the phrase “COLOR OUTSIDE THE LINES.” The concept represents the group’s desire to think freely and move beyond established expectations.
Conclusion
The members of Cortis are MARTIN, JAMES, JUHOON, SEONGHYEON and KEONHO. Together, they form a five-member BIGHIT MUSIC group built around music, performance and creative collaboration.
MARTIN leads the group while also taking a significant role in production, and the other members contribute across songwriting, composition, choreography and visual work. Rather than defining each member through a single fixed position, CORTIS emphasizes what the five can create together.
Their debut project, COLOR OUTSIDE THE LINES, offers the clearest introduction to that philosophy. From “GO!” and “What You Want” to “JoyRide” and “Lullaby,” the group’s early music reflects an interest in experimentation and self-expression.
For anyone discovering CORTIS for the first time, learning the five members is only the starting point. Their growing involvement in the creative process is arguably one of the most important parts of understanding what makes the group distinctive.
