HAEGIN announced on September 9 that it has signed brand advertising model contracts for 2026 Professional Baseball GO! with popular cheerleaders Seo Hyun-sook, Chun So-yoon, and Lee Ye-bin. This model selection was carried out to strengthen game promotions ahead of the Asian Games baseball matches and the KBO postseason. The three cheerleaders selected as advertising models are Seo Hyun-sook of Doosan, Chun So-yoon of Samsung, and Lee Ye-bin of kt.

HAEGIN has completed shooting new TV commercials and print pictorials with them under the slogan 'Going all out even in cheering!'. The newly unveiled TV commercials contain the message 'Go, Republic of Korea to win!' wishing for the good performance of the upcoming Asian Games baseball national team. At the same time, it vividly expresses the heated atmosphere of the postseason.

The three cheerleaders are representative figures who are greatly loved among baseball fans for their unrivaled visuals and energetic performances, and they can also be met through the 'Cheerleader' content in the game. Users can collect and complete cheerleader photo pieces in the game to further strengthen their club's power, and experience the vitality of the actual cheering stage inside the game.

Meanwhile, HAEGIN plans to present a making-of film capturing the vivid atmosphere of the advertisement shooting site and the various charms of the models together. The making-of videos will be released sequentially over four days, starting with the Seo Hyun-sook version on September 9, followed by the Lee Ye-bin version on September 10, the Chun So-yoon version on September 11, and the full version on September 12.