What makes Mastermind by Highlight notable?

The EP received positive reviews and helped cement Highlight's place in the K-pop industry, showcasing their growing popularity. Notably, 'Mastermind' contributed to the group's rise in the charts, increasing their visibility and setting the stage for future successes. Its polished production and catchy melodies demonstrated an evolution in their sound that resonated with fans. Released on September 28, 2010, 'Mastermind' was Highlight's first EP following their debut album in 2009. At this stage in their career, the group was solidifying its identity in the burgeoning K-pop scene while exploring new sounds. This EP marked a critical moment as they sought to expand their musical horizons and connect with a wider audience.