5th Gen · Boy Group
CORTIS 코르티스
Five-member BIGHIT MUSIC boy group (acronym for "Color Outside the Lines") debuted August 18, 2025. Billed as a self-producing "young creator crew" with no fixed positions, all five members co-produce music, choreography, and visuals.
- Debut
- 2025-08-18
- Generation
- 5th Gen
- Active Roster
- 5 Members
- Agency
- BIGHIT MUSIC
- Fandom
- COER
- Structure
- Fluid Roles
Status Note Active 5-member self-producing "young creator crew"; BIGHIT MUSIC’s first boy group in 6 years since TXT, topping Circle Digital Chart in 2026 with "REDRED".
01 / Roster
Members (5)
| Member | Born | Nationality | Roles | Specs | Career Note |
|---|---|---|---|---|---|
| James | 2005-10-14 | Thai-Chinese (Hong Kong/Taiwan) | Co-Creator Crew (No Fixed Positions) | — | Multilingual former Trainee A member who stayed at BIGHIT to co-choreograph and produce CORTIS’s debut catalog. |
| Juhoon | 2008-01-03 | South Korean | Co-Creator Crew (No Fixed Positions) | — | Former youth basketball player and child model who co-writes toplines and lyrics across CORTIS releases. |
| Martin | 2008-03-20 | Canadian-Korean | Leader, Co-Creator Crew (No Fixed Positions) | 190.5 cm | 190.5 cm producer-leader who earned pre-debut songwriting credits on ILLIT’s "Magnetic" and TXT’s "Deja Vu." |
| Seonghyeon | 2009-01-13 | South Korean | Co-Creator Crew (No Fixed Positions) | — | Joined BIGHIT MUSIC at age 13 and co-arranges beats, vocal direction, and video concepts with the crew. |
| Keonho | 2009-02-14 | South Korean | Co-Creator Crew, Maknae | — | Scouted at a bus stop after elementary-school swimming practice and trained at BIGHIT into a multi-hyphenate creator. |
02 / Essential Listening
Where to Start with CORTIS
Interactive Index