CORTIS has made K-Pop history by becoming just the second group ever to sell 2 million copies of their debut album. Circle Chart officially awarded the BIGHIT MUSIC rookie boy group a double million certification on March 5 for their debut EP "COLOR OUTSIDE THE LINES."

The achievement is remarkable considering CORTIS has been active for less than a year. Reaching double million seller status with a debut release puts them in extremely rare company within the K-Pop industry.

While the source doesn't specify which group was the first to achieve this milestone, CORTIS joining this exclusive club demonstrates the significant impact they've made since their debut. The "COLOR OUTSIDE THE LINES" EP clearly resonated with fans worldwide, driving impressive sales numbers that many established groups struggle to reach.

This certification from Circle Chart, Korea's official music chart, validates CORTIS as a major force in the current K-Pop landscape. For a rookie group to move 2 million physical copies of their first release indicates strong fan dedication and widespread appeal.

The achievement also reflects well on BIGHIT MUSIC's ability to develop and promote new talent. Having a subsidiary label artist reach such heights so quickly adds to the company's growing reputation in artist development.

With this historic milestone already under their belt, CORTIS has set the bar incredibly high for their future releases. The group's ability to capture both domestic and international attention with their debut suggests they'll be a name to watch as their career progresses.

The double million certification serves as validation that CORTIS has successfully established themselves as more than just another rookie group – they're now part of K-Pop history.