BOYNEXTDOOR, the K-pop boy group comprising SUNGHO, RIWOO, JAEHYUN, TAESAN, LEEHAN, and WOONHAK, has released their mini-album '19.99,' which features seven tracks including the lead single 'Nice Guy.' The album symbolizes the members' transition from adolescence to adulthood and was launched during a media showcase on September 9. Each member contributed to the songwriting and production, showcasing their artistic growth and relatability as they tackle themes of youth and the challenges of turning 20. Executive producer ZICO and main producer Pop Time helped shape the uplifting sound of the album, characterized by its disco beats and candid lyrics. As the first group under KOZ Entertainment, BOYNEXTDOOR has quickly gained a loyal fanbase and significant streaming numbers, reflecting their connection with listeners. The group aims to resonate with young adults facing similar experiences of emotional growth and uncertainty as they approach this pivotal age.