What makes Only One by U-KISS notable?

'Only One' marked a significant moment for U-KISS as it helped solidify their place in the K-pop landscape, featuring several tracks that showcased the group's vocal talent and versatility. The album's remixed tracks gained traction, contributing to their chart performance and establishing a template for future K-pop albums that included multiple versions of songs. Released on February 3, 2010, 'Only One' was U-KISS's first full-length album after their debut mini-album in 2009. At this point, the group was transitioning from a newcomer status to becoming a recognized act in the burgeoning K-pop scene, capitalizing on their growing popularity with fans both domestically and internationally.