IST Entertainment's rookie boy group ATBO continues to prepare for their debut mini album, 'The Beginning: 開花 (Gaehwa).'

On July 20 at midnight KST, the boys dropped the highlight medley to tease their new mini-album. The album includes a total of six tracks, "7IBE", "Monochrome," "Graffiti," "High Five," "WoW," and "RUN."

Meanwhile, the 7-member rookie boy group ATBO is set to debut on July 27 at 6 PM KST with 'The Beginning: 開花 (Gaehwa).'