CORTIS (abbreviation for "Color Outside The Lines"; Korean: 코르티스) is the first South Korean boy group in 6 years to debut under BIGHIT MUSIC, a subsidiary of HYBE Corporation. The group is composed of 5 members: Martin (마틴), James (제임스), Juhoon (주훈), Seonghyeon (성현) and Keonho (건호).